Features

• Super simple, cross platform installation.
• Track time spent in functions by self cost or inclusive cost. Inclusive cost is time inside function + calls to other functions.
• See if time is spent in internal or user functions.
• See where any function was called from and which functions it calls.

Installation

1. Download Webgrind.
2. Unzip package to favourite path accessible by a Web server.
3. Load Webgrind in browser and start profiling.

More info

Любой работодатель хочет принять на работу действительно полезного работника и хочет что бы тот был на все 100% отличным сотрудником. Поиски такого сотрудника занимают уйму времени и часто работодателям сложно проверить врет или нет соискатель!

Сегодня я расскажу Вам о том как предлагает устроиться на работу одна Санкт-Петербургская компания. Называть ее я не буду, что бы они не дай бог не подумали что я о них ;-)

Итак, тестовое задание состоит из исходного файла содержащего две закодированные подпрограммы =) Причем, первый код декодирует второй и после выполнения нехитрой замены(хотя ткнуть носом в то место где собака зарыта я не смогу - понял пока только идею уловки).

Как не трудно догадаться нужно получить расшифрованный вариант начального исходного кода!

Нет! А самое смешное, что если Вам удалось расшифровать код, то вы в принципе способны взломать всю систему!

Таким вот образом если вы Хакер автоматом зачисляют на работу!

Помоему просто гениально!

UPD. Собака зарыта в очень хитрой бинарной замене символа 0x0A в исходной декодированной строке функцией strtr в переменной $_X!

UPD2: Кстати просто гениальное решение пришло от подсказки, можно заменить во второй подпрограмме функцию eval на print.

P.S. Если кому-то интересно пишите в коментариях свою контактную информацию - вышлю это тестовое задание!

1. En nuestro HTML ponemos un Flash que va a desplegar el contenido que querramos.

2. Programamos el flash para que acceda a un PHP que nos va a traer los datos que querramos.

3. En el servidor Windows subimos el HTML, y en un servidor Linux (otro que tengamos) subimos el Flash y el PHP. El HTML levanta el flash que está en el servidor Linux (para eso ponemos la ruta absoluta donde está el flash en el HTML ej: http://www.midominiolinux.com/flashito.swf).

ATENCIÓN: (y esto es el punto importante de este post) para que el flashito levante las cosas del PHP y funcione correctamente, hay que poner la ruta absoluta del php dentro del flash (ej. no alcanza con poner load (miphp.php) por más que el swf esté en la misma carpeta que el php.. hay que poner "load (http://www.midominiolinux.com/miphp.php).

So in the spirit of How-to's I am actually going to walk you through some tips on how to Skin your mediawiki to fit your company's theme.

Mediawiki engine provides some great implementation on changing or customizing its skin. these pages can be customizable and can be changed provided you have enough privileges and ‘sysop’ rights. In this document we will provide instructions and “how-to’s” in customizing your mediawiki skin.

Manual Skinning

In preparation for manual skinning you need to decide what skins to use, Mediawiki comes with few skins during installation process, namely “Monobook” (which is the popular one) ,”Classic”, “Blue Cologne” and “Simple”. You can preview these by going to [My Preferences]-> [Skins]

What you need to do is to copy the Style that you want for instance “Monobook” then rename it as follows:

Copy folder “Monobook” rename to something like “Companypedia”

Copy file “monobook.php” take note that the filename is in lowercase and folder is in uppercase reason for this is that the folder is the extension of your class, you will notice later when we get to that part.

After copying monobook.php re-name it to companypedia.php (lowercase remember?)

Then open mpedia.php using any of your favorite editor.

Go to the following line and do the changes as follows:

class SkinMonobook extends SkinTemplate { // becomes : class SkinCompanypedia extends SkinTemplate

/** Using monobook. */ //using mpedia

function initPage( &$out ) {

SkinTemplate::initPage( $out );

$this->skinname = 'monobook'; // becomes: $this->skinname=’companypedia’;

$this->stylename = 'monobook'; // becomes: $this->stylename=’companypedia’;

$this->template = 'MonobookTemplate'; // becomes: $this->template=’companypedia’;

}

}

Then also do the following changes on this line:

wfRunHooks( 'MonobookTemplateToolboxEnd', array( &$this ) ); // becomes: CompanypediaTemplateToolBoxEnd

Now the fun part…

Once you have completed the above task, you have a new skin to switch to new skin go to your site and on the Preference-> select a skin and select ‘mpedia’ as your new skin before attempting to edit the main.css so you can monitor the changes you will be making.

The most useable parts in the CSS are the following:

(Open your main.css under the new folder you have created ‘companypedia’)

You normally start off with the Body { this helps you setup your header-image and can be set as a background

#column-one { padding-top:135px; } this here is responsible for your left navigation tab making changes to ‘padding’ will bring down or up your left navigation box

#content { this style is responsible for your middle content you can play with the bg and stuff.

#globalWrapper { this one can set your site in the middle or left or right align and provide borders on the whole body.

#p-cactions { this provides manipulation on the top menus such as edit, discussions , help etc.

#p-personal { is your personal toolbar, this is the link on the right hand top corner of your site where your login information is located

#p-search { is your search box, with the proper settings you can place this anywhere without destroying other elements in the page

#p-logo { by playing with this settings you can increase/decrease your logo and position it according to your design

.portlet { this is element holding your menu tabs in the left navigation

#footer { self explanatory, this is the footer of the page

There you have it, it's always a good idea to back up your files whenever your working on the production site, I'm sure you know why, it's always a good practice to have a backup of the original files you are messing around with.

]]> http://marinifamily.wordpress.com/?p=502 Tue, 07 Oct 2008 16:01:01 +0000 Timmy http://marinifamily.cs.wordpress.com/2008/10/07/my-website/ Folks,

I own a website at www.marinifamily.org I don't know if you are all aware. I have been very neglectful in maintaining it. I have really shifted focus to this and other blogs. I also keep up on Twitter and Facebook and even a small amount of time on MySpace. I love my old webpage and it offers freedoms that these others lack. I can have advertising and javascript apps that Wordpress rules out.

At this point, I am facing some decisions as to what the future of my webpage should be. I feel like I can communicate better through blogging. I feel like more of you can be exposed to my life and thoughts in a more narrative fashion. Blogging is very easy and powerful. I've seen it cause a great deal of change. It's stirred up plenty of heated debate and discussion that otherwise wouldn't be possible on a normal webpage.

I keep renewing my domain each year and don't plan to let it expire. I am grateful for David's server space and support. I would like to learn more about HTML, XML, PHP and such things.

My purpose in writing this is to just have you all go take a peak, see what there is to see and come back and comment here. What are some good ideas that I can work on. It's an open canvas. Thanks in advance for your help.

-Timmy

PDO Introduction

PDO (PHP Data Objects) adalah salah satu ekstensi yang disupport oleh PHP5 untuk mendefinisikan lightweight DBMS connection abstraction library atau dapat juga disebut database abstraction library. PDO digunakan untuk melakukan koneksi dengan berbagai macam database yang di support oleh PHP.

Jika anda pernah menggunakan PHP dan database MySQL anda pasti pernah menggunakan perintah-perintah sebagai berikut:

mysql_connect($host, $user, $password);
mysql_select_db($db);

Atau ketika anda menggunakan PHP dan database SQL Lite maka anda menggunakan perintah:

$dbh = sqlite_open($db, 0666);

Dengan menggunakan perintah-perintah tersebut diatas maka aplikasi yang anda buat akan terikat dengan database yang anda gunakan secara spesifik. Ketika anda akan melakukan migrasi database maka anda harus merubah seluruh script anda, dan hal ini akan sangat menyulitkan anda.

PDO menawarkan cara yang berbeda untuk bekerja dengan database secara lebih umum, dengan PDO perintah yang anda tuliskan untuk koneksi dengan database MySQL, SQLite, dan Postgree adalah sebagai berikut:

// For MySQL:
$conn = new PDO("mysql:host=$host;dbname=$db", $user, $pass);
// For SQLite:
$conn = new PDO("sqlite:$db");
// And for PostgreSQL:
$conn = new PDO("pgsql:host=$host dbname=$db", $user, $pass);

Dengan PDO anda akan tidak perlu mengganti kode yang sudah anda buat sebelumnya ketika akan melakukan migrasi program.

Pada tutorial dibawah ini penulis akan menunjukan bagaimana cara bekerja dengan database menggunakan PDO.

Database Sample

Buat sample database yang akan digunakan pada aplikasi contoh, pertama buat database dengan nama pdo kemudian buat dua table dengan nama books dan authors

mysql> create database pdo;
Query OK, 1 row affected (0.05 sec)
mysql> use pdo;
Database changed
mysql> create table books(
    -> id int primary key not null auto_increment
    -> author int not null,
    -> title varchar(70) not null,
    -> isbn varchar(20),
    -> publisher varchar(30) not null,
    -> year int(4) not null,
    -> summary text(2048));
Query OK, 0 rows affected (0.17 sec)
mysql> create table authors(
    -> id int primary key not null auto_increment
    -> firstName varchar(30) not null,
    -> lastName varchar(40) not null,
    -> bio text(2048));
Query OK, 0 rows affected (0.00 sec)

Tambahkan record kedalam table author sebagai berikut:

mysql> insert into authors(firstName, lastName, bio) values(
     -> 'Marc', 'Delisle', 'Marc Delisle is a member of the MySQL
Developers Guide');
Query OK, 1 row affected (0.14 sec)
mysql> insert into authors(firstName, lastName, bio) values(
     -> 'Sohail', 'Salehi', 'In recent years, Sohail has contributed
to over 20 books, mainly in programming and computer graphics');
Query OK, 1 row affected (0.00 sec)
mysql> insert into authors(firstName, lastName, bio) values(
     -> 'Cameron', 'Cooper', 'J. Cameron Cooper has been playing
around on the web since there was not much of a web with which to
play around');
Query OK, 1 row affected (0.00 sec)

Jika anda select semua data pada table authors maka dapt dilihat recordnya sebagai berikut:

mysql> select id, firstName, lastName from authors;
+----+-----------+----------+
| id | firstName | lastName |
+----+-----------+----------+
|  1 | Marc      | Delisle  |
|  2 | Sohail    | Salehi   |
|  3 | Cameron   | Cooper   |
+----+-----------+----------+
3 rows in set (0.03 sec)

Tambahkan record pada table books sebagai berikut:

mysql> insert into books(author, title, isbn, publisher, year,
summary) values(
     -> 1, 'Creating your MySQL Database: Practical Design Tips and
Techniques', '1904811302', 'Packt Publishing Ltd', '2006',
     -> 'A short guide for everyone on how to structure your data and
set-up your MySQL database tables efficiently and easily.');
Query OK, 1 row affected (0.00 sec)
mysql> insert into books(author, title, isbn, publisher, year,
summary) values(
     -> 2, 'ImageMagick Tricks', '1904811868', 'Packt Publishing
Ltd', '2006',
     -> 'Unleash the power of ImageMagick with this fast, friendly
tutorial, and tips guide');
Query OK, 1 row affected (0.02 sec)
mysql> insert into books(author, title, isbn, publisher, year,
summary) values(
     -> 3, 'Building Websites with Plone', '1904811027', 'Packt
Publishing Ltd', '2004',
     -> 'An in-depth and comprehensive guide to the Plone content
management system');
Query OK, 1 row affected (0.00 sec)

Mendesain Kode

Desain arsitektur aplikasi yang baik adalah salah satu kunci membangun aplikasi selain desain data model yang benar. Pada contoh aplikasi yang akan dibuat kali ini, pertama anda harus membuat file untuk koneksi dengan database yang akan dipanggil disetiap file yang membutuhkan koneksi dengan database.

Pertama buat file dengan nama common.inc.php yang akan berisi kode untuk koneksi dengan database. Kemudian tuliskan kodenya sebagai berikut:

<?php
/**
 *File untuk koneksi 
 */
//dbconnection string dan username/password
$connStr="mysql:host=localhost;dbname=pdo";
$user="root";
$pass="";

function showHeader($title){
?>
  <html>
  <head><title><?=htmlspecialchars($title)?></title></head>
  <body>
  <h1><?=htmlspecialchars($title)?></h1>
  <a href="books.php">Books</a>
  <a href="authors.php">Authors</a>
  <hr/>
<?php
}

function showFooter(){
?>
  </body>
  </html>
<?php
}

//membuat connection object
$conn = new PDO($connStr,$user,$pass);
?>

Untuk menampilkan data yang ada pada table books buat file books.php, kemudian ketikan kode berikut:

<?php
include_once 'common.inc..php';

$q = $conn->query("select * from books order by title");

showHeader('Books');
?>
<table width="100%" border="1" cellpadding="3">
<tr style="font-weight: bold">
  <td>Title</td>
  <td>ISBN</td>
  <td>Publisher</td>
  <td>Year</td>
  <td>Summary</td>
</tr>
<?php
while($r=$q->fetch(PDO::FETCH_ASSOC)){
?>
  <tr>
    <td><?=htmlspecialchars($r['title'])?></td>
    <td><?=htmlspecialchars($r['isbn'])?></td>
    <td><?=htmlspecialchars($r['publisher'])?></td>
    <td><?=htmlspecialchars($r['year'])?></td>
    <td><?=htmlspecialchars($r['summary'])?></td>
  </tr>
<?php
}
?>
</table>
<?php
    showFooter();
?>

Jika dijalankan maka tampilannya adalah sebagai berikut :

Untuk menampilkan data pada table author buat halaman dengan nama authors.php, kemudian ketik kodenya sebagai berikut:

<?php
include_once 'common.inc.php';
$q=$conn->query("select * from authors order by lastname,firstname");
showHeader('Authors');
?>
<table width="100%" border="1" cellpadding="3">
<tr style="font-weight: bold">
  <td>First Name</td>
  <td>Last Name</td>
  <td>Bio</td>
</tr>
<?php
    while($r=$q->fetch(PDO::FETCH_ASSOC)){
?>
    <tr>
        <td><?=htmlspecialchars($r['firstName'])?></td>
        <td><?=htmlspecialchars($r['lastName'])?></td>
        <td><?=htmlspecialchars($r['bio'])?></td>
      </tr>
<?
    }
?>
</table>
<?php
    showFooter();
?>

Menggunakan Parameter untuk menampilkan Author

Pada contoh dibawah ini akan ditunjukan bagaimana cara untuk menggunakan parameter yang dikirimkan lewat url (query string). Buat file dengan nama authordetails.php kemudian tulis kode berikut:

<?php
include_once('common.inc.php');

$id = $_REQUEST['id'];
$q = $conn->query("select * from authors where id=$id");
$author = $q->fetch(PDO::FETCH_ASSOC);
$q->closeCursor();

if(!$author){
    showHeader('Error');
    echo "Salah memasukan id author";
    showFooter();
    exit;
}
showHeader("Author: $author[firstName] $author[lastName]");
$q = $conn->query("select * from books where author=$id order by title");
$q->setFetchMode(PDO::FETCH_ASSOC);

?>
<h2>Author</h2>
<table width="60%" border="1" cellpadding="3">
<tr>
  <td><b>First Name</b></td>
    <td><?=htmlspecialchars($author['firstName'])?></td>
</tr>
<tr>
  <td><b>Last Name</b></td>
  <td><?=htmlspecialchars($author['lastName'])?></td>
</tr>
<tr>
  <td><b>Bio</b></td>
  <td><?=htmlspecialchars($author['bio'])?></td>
</tr>
</table>

<h2>Books</h2>
<table width="100%" border="1" cellpadding="3">
<tr style="font-weight: bold">
  <td>Title</td>
  <td>ISBN</td>
  <td>Publisher</td>
  <td>Year</td>
  <td>Summary</td>
</tr>

<?php
while($r=$q->fetch()){
?>
<tr>
      <td><?=htmlspecialchars($r['title'])?></td>
      <td><?=htmlspecialchars($r['isbn'])?></td>
      <td><?=htmlspecialchars($r['publisher'])?></td>
      <td><?=htmlspecialchars($r['year'])?></td>
      <td><?=htmlspecialchars($r['summary'])?></td>
</tr>
<?php
}
?>
</table>
<?php
showFooter();
?>

Jalankan dengan menuliskan alamat url http://localhost/authordetails.php?id=2, anda dapat melihat hasil tampilan sebagai berikut:

Jika id yang anda masukan tidak ada misal: http://localhost/authordetails.php?id=99 maka akan muncul halaman error-nya

Menggabungkan Dua Table

Pada contoh dibawah ini akan digabungkan dua table yaitu books dan authors, kemudian ketika user memilih daftar author yang ada maka detail author akan ditampilkan.

<?php
include_once('common.inc.php');

$q = $conn->query("SELECT authors.id, firstName, lastName, books.*
                   FROM authors, books WHERE author=authors.id ORDER BY title");
$q->setFetchMode(PDO::FETCH_NUM);
showHeader('Books');
?>
<table width="100%" border="1" cellpadding="3">
<tr style="font-weight: bold">
  <td>Author</td>
  <td>Title</td>
  <td>ISBN</td>
  <td>Publisher</td>
  <td>Year</td>
  <td>Summary</td>
</tr>
<?php
while($r=$q->fetch()){
?>
<tr>
    <td><a href="authordetails.php?id=<?=$r[0]?>">
    <?=htmlspecialchars("$r[1] $r[2]")?></a></td>
    <td><?=htmlspecialchars($r[5])?></td>
    <td><?=htmlspecialchars($r[6])?></td>
    <td><?=htmlspecialchars($r[7])?></td>
    <td><?=htmlspecialchars($r[8])?></td>
     <td><?=htmlspecialchars($r[9])?></td>
</tr>
<?php
}
?>
</table>
<?php
    showFooter();
?>

Error Handling

PHP5 mempunyai fasilitas try..catch untuk menangani error yang terjadi, dengan PDO anda juga dapat menangkap error yang dapat terjadi, sebagai contoh tambahkan kode berikut pada file common.inc.php.

<?
function showError($message){
    echo"<h2>Error</h2>";
    echo "<p>".htmlspecialchars($message)."</p>";
    showFooter();
    exit;
}
//membuat connection object
try
{
    $conn = new PDO($connStr,$user,$pass);
    $conn->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);
}
catch(PDOException $e)
{
    showHeader('Error');
    showError("Maaf, error ditemukan.. koneksi gagal.. \n" . $e->getMessage());
}
?>

Jika terjadi error maka akan tampil halaman sebagai berikut:

Membuat Fasilitas Edit Books

Sekarang kita akan menambahkan fasilitas untuk mengedit data pada table books, buat file dengan nama editbook.php. sebelum menambahkan kode program tambahkan dulu index pada field isbn pada table books, karena field isbn tidak boleh diisi dengan nilai yang sama.

CREATE UNIQUE INDEX idx_isbn ON books(isbn);

Kemudian ketik kode berikut pada file editbook.php

<?php
include_once('common.inc.php');

//ambil id buku
$id = (int)$_REQUEST['book'];
if($id){
    $q = $conn->query("select * from books where id=$id");
    $book = $q->fetch(PDO::FETCH_ASSOC);
    $q->closeCursor();
    $q=null;
}
else{
    //membuat buku baru
    $book=array();
}

//membuat list dari author
$author = array();
$q = $conn->query("SELECT id, lastName, firstName FROM authors ORDER BY lastName, firstName");
$q->setFetchMode(PDO::FETCH_ASSOC);
while($a=$q->fetch()){
    $authors[$a['id']]="$a[lastName], $a[firstName]";
}

if($_POST['submit']) {
      // memvalidasi setiap field
      $warnings = array();
      //title 
      if(!$_POST['title'])
    {
        $warnings[] = 'Silahkan menginputkan book title';
    }
    // Author harus ada dalam key pada $authors array
      if(!array_key_exists($_POST['author'], $authors))
      {
        $warnings[] = 'Silahkan memilih author yang mengarang buku';
      }
      // ISBN harus berupa 10-digit number
      if(!preg_match('~^\d{10}$~', $_POST['isbn'])) {
        $warnings[] = 'ISBN harus 10 digits';
      }
      // Published tidak boleh kosong
      if(!$_POST['publisher']) {
        $warnings[] = 'Silahkan masukan publisher';
      }
      // Year harus 4 digits
      if(!preg_match('~^\d{4}$~', $_POST['year'])) {
        $warnings[] = 'Year harus 4 digits';
      }
      // Sumary tidak boleh kosong
      if(!$_POST['summary']) {
        $warnings[] = 'Silahkan masukan summary';
      }

      //jika tidak ada error
      if(count($warnings) == 0) {
        if(@$book['id']) {
              $sql = "UPDATE books SET title=" . $conn>quote($_POST['title']) .
            ', author=' . $conn->quote($_POST['author']) .
            ', isbn=' . $conn->quote($_POST['isbn']) .
            ', publisher=' . $conn->quote($_POST['publisher']) .
            ', year=' . $conn->quote($_POST['year']) .
            ', summary=' . $conn->quote($_POST['summary']) .
            " WHERE id=$book[id]";
    }
    else { //klo belum ada maka tambahkan data
              $sql = "INSERT INTO books(title, author, isbn, publisher,
              year,summary) VALUES(" .
            $conn->quote($_POST['title']) .
              ', ' . $conn->quote($_POST['author']) .
            ', ' . $conn->quote($_POST['isbn']) .
            ', ' . $conn->quote($_POST['publisher']) .
            ', ' . $conn->quote($_POST['year']) .
            ', ' . $conn->quote($_POST['summary']) .
            ')';
    }
    try
    {
        $conn->query($sql);
          header("Location: books.php");
          exit;
    }
    catch(PDOException $e)
    {
        $warnings[] = 'Error: Duplikasi ISBN..';
    }
  }
}
else {
     // Form tidak tersubmit
      $_POST = $book;
}

showHeader('Edit Book');

if(count($warnings)) {
      echo "<b>Please correct these errors:</b><br>";
      foreach($warnings as $w)
      {
        echo "- ", htmlspecialchars($w), "<br>";
      }
}

?>

<form action="editBook.php" method="post">
<table border="1" cellpadding="3">
<tr>
    <td>Title</td>
    <td>
      <input type="text" name="title"
           value="<?=htmlspecialchars($_POST['title'])?>">
    </td>
  </tr>
  <tr>
    <td>Author</td>
    <td>
      <select name="author">
        <option value="">Please select...</option>
        <?php foreach($authors as $id=>$author) { ?>
          <option value="<?=$id?>"
            <?= $id == $_POST['author'] ? 'selected' : ''?>>
            <?=htmlspecialchars($author)?>
          </option>
        <?php } ?>
      </select>
    </td>
  </tr>
  <tr>
    <td>ISBN</td>
    <td>
      <input type="text" name="isbn"
         value="<?=htmlspecialchars($_POST['isbn'])?>">
    </td>
  </tr>
  <tr>
    <td>Publisher</td>
    <td>
      <input type="text" name="publisher"
         value="<?=htmlspecialchars($_POST['publisher'])?>">
    </td>
  </tr>
  <tr>
    <td>Year</td>
    <td>
      <input type="text" name="year"
         value="<?=htmlspecialchars($_POST['year'])?>">
    </td>
  </tr>
  <tr>
    <td>Summary</td>
    <td>
      <textarea name="summary"><?=htmlspecialchars(
                                    $_POST['summary'])?></textarea>
  </td>
  </tr>
  <tr>
    <td colspan="2" align="center">
      <input type="submit" name="submit" value="Save">
    </td>
  </tr>
  </table>
  <?php if(@$book['id']) { ?>
    <input type="hidden" name="book" value="<?=$book['id']?>">
  <?php } ?>
</form>
<?php
// Display footer
showFooter();
?>

Kemudian tambahkan kode berikut pada halaman books.php

<tr>
    <td><?=htmlspecialchars($r['title'])?></td>
    <td><?=htmlspecialchars($r['isbn'])?></td>
    <td><?=htmlspecialchars($r['publisher'])?></td>
    <td><?=htmlspecialchars($r['year'])?></td>
    <td><?=htmlspecialchars($r['summary'])?></td>
    <td>
      <a href="editBook.php?book=<?=$r['id']?>">Edit</a> //tambahan
    </td>
</tr>

</table>
<a href="editBook.php">Tambah Buku...</a> //tambahan

Ketika link edit ditekan maka muncul tampilan dibawah ini:

Ketika link Tambah Buku ditekan maka tampil halaman berikut untuk menambah data:

Membuat Fasilitas Edit Author

Setalah membuat halaman untuk edit books maka sekarang kita akan membuat halaman untuk edit author, buat halaman dengan nama editauthor.php kemudian tambahkan kode berikut:

<?php
include('common.inc.php');

$id = (int)$_GET['author'];

if($id){
    $q = $conn->query("select * from authors where id=$id");
    $author = $q->fetch(PDO::FETCH_ASSOC);
    $q->closeCursor();
    $q=null;
}
else{
    $author=array();
}

if($_POST['submit']){
    $warnings=array();

    if(!$_POST['firstName']) {
        $warnings[] = 'Silahkan masukan first name';
      }

      if(!$_POST['lastName']) {
        $warnings[] = 'Silahkan masukan last name';
      }

      if(!$_POST['bio']) {
        $warnings[] = 'Silahkan masukan bio';
      }

      //jika tidak ditemukan error 
    if(count($warnings)==0){
            $sql = "update authors set firstName=".$conn->quote($_POST['firstName']).
            ",lastName=".$conn->quote($_POST['lastName']).
            ",bio=".$conn->quote($_POST['bio']).
            " where id=".$_POST['author'];
        $conn->query($sql);
        header("Location: authors.php");
    }

}
else { //form tidak disubmit
    $_POST=$author;
}

showHeader("Edit Author");

if(count($warnings)){
    echo "<strong>Error ditemukan :<br/></strong>";
    foreach($warnings as $w){
        echo "- ". htmlspecialchars($w), "<br/>";;
    }
}
?>

<form action="editAuthor.php" method="post">
  <table border="1" cellpadding="3">
  <tr>
    <td>First name</td>
    <td>
      <input type="text" name="firstName"
           value="<?=htmlspecialchars($_POST['firstName'])?>">
    </td>
  </tr>
  <tr>
    <td>Last name</td>
    <td>
      <input type="text" name="lastName"
           value="<?=htmlspecialchars($_POST['lastName'])?>">
               </td>
  </tr>
  <tr>
    <td>Bio</td>
    <td>
      <textarea name="bio"><?=htmlspecialchars($_POST['bio'])?>
      </textarea>
    </td>
  </tr>
  <tr>
    <td colspan="2" align="center">
         <input type="submit" name="submit" value="Save" />
    </td>
  </tr>
  </table>

    <input type="hidden" name="author" value="<?=$_POST['id']?>" />

</form>
<?php
// Display footer
showFooter();
?>

Kemudian pada halaman author.php tambahkan kode untuk link ke halaman editauthor sebagai berikut:

<tr>
    <td><?=htmlspecialchars($r['firstName'])?></td>
    <td><?=htmlspecialchars($r['lastName'])?></td>
    <td><?=htmlspecialchars($r['bio'])?></td>
    <td>
      <a href="editAuthor.php?author=&lt;?=$r['id']?>">Edit</a>
    </td>
</tr>

Sumber: Dennis Popel, "Learning PHP Data Object", Packt 2007.

In that same vein I've created a simple wrapper for Zend View. I found this useful in instances where I didn't need to use Zend Framework's whole MVC implementation. Zend View is extremely helpful in creating a quick templating system for smaller projects or custom frameworks.

Once again I'll be assuming the following:

• You have installed Zend Framework and set up the necessary include paths
• You have read the documentation pertaining to Zend_View

First our view wrapper/abstraction class (view.php) :

[sourcecode language="php"]
/**
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to calisza@gmail.com so we can send you a copy immediately.
*
* @package FlexiDev_View
* @copyright Copyright (c) 2007 - 2008, Flexible Developments - Barry Roodt (http://calisza.wordpress.com)
* @license New BSD License
* @version $Id: View.php Fri Oct 03 2008 1.0 barry roodt $
*/
class View {
public $tmplVars;
public $view;

/**
Constructor
*/
public function __construct(){

$this->tmplVars = array();
// Instantiate our Zend View
$this->view = new Zend_View();

/**
* reset our basepath and scriptpaths, this is because we don't need the 'scripts', 'helpers' and 'filters' sub folders
* relative to this script - of course you could change this as your needs require
*/
$this->view->setBasePath("./view");
$this->view->setScriptPath("./view");

// set and assign some global vars to our template
// this is just an example - you can add more here
$globals = array("base_url" => $_SERVER["HTTP_HOST"]);
$this->view->assign($globals);
}
/**
* Method to add to our template variable stack
* @param string variable name
* @param mixed value
*/
public function addTmplVar($key, $value){
/* If our stack doesn't already exist, create a new array */
if (!is_array($this->tmplVars)){
$this->tmplVars = array($key=>$value);
} else {
// Add to our variable stack
$this->tmplVars[$key] = $value;
}
}
/**
* Method to render the required view/template
* @param string template script name
* @param bool (optional) clear variable stack (default=true)
*/
public function getTemplate($tmpl, $clearVars=true){
/* Add our variable stack to the template */
$this->view->assign($this->tmplVars);
/* If required, clear our stack so that we can start with a fresh template on the next call */
if ($clearVars)
$this->tmplVars = "";

/* Return the rendered template */
return $this->view->render($tmpl);
}

}

?>
[/sourcecode]

Next for some example usage (index.php) :

[sourcecode language="php"]
require_once("View.php");
$items = array ("Name" => "Barry", "Surname" => "Roodt", "Title" => "Mr");
$view = new View();
$view->addTmplVar("myitems", $items);
echo $view->getTemplate("template.phtml");
?>
[/sourcecode]

And finally our view template (template.phtml) :

[sourcecode language="php"]

[/sourcecode]

You can also view an example of this class in action here.

As always, comments, critiques and corrections welcome.

Lets look at this post in two parts:
Moodle:
I created a category in Moodle, called Mobile. I then built a short course in Moodle, putting all the content into the topic section on the front page of the lesson. Remember that a mobile device has a small screen (no shit sherlock, you think to yourself), and everything you add to the course has got to earn the right to be there. Remind yourself of this when you add an image, write text or plan the layout.

Cool, so now we have a course in Moodle, and you have enrolled for it. And you can change it's content, and you can do all the other Moodle stuff to it. Now lets look at the Mobile side.

Mobile:
I access Moodle via the new bit of code that I wrote, and log in using my Moodle username and password. A page is then displayed allowing me to view my Mobile courses, Forum posts, and site news. Selecting the 'course' icon will display all the mobile courses that I have enrolled for. Select a course and off you go.

The easiest way to really understand this is to go and play with it.
Username: mary
Password: password
Link: http://www.ilite.co.za/mlearn/

$query = "SELECT * FROM user WHERE user_id = $i";

//run the query and fetch data
}

In each iteration, the first thing the MySQL engine does is to parse the query for syntax check. Then it sets up the query and runs it. Since the query remains unchanged during each iteration(except for the value of user_id), parsing the the query each time is definitely an overhead. In such cases use of prepared statements is most convenient. A prepared statement is just like a typical query, except that it has 'placeholders' that are supplied values at run time. The prepared statement in this case will look like this:

"SELECT * FROM user WHERE user_id = ?"

Notice the placeholder('?') for the value of user_id in the query. Now MySQL engine needs to parse the query only once, then execute it 1000 times by binding the placeholder with PHP script supplied value for user_id. This pre-parsing of the query results in a significant performance boost.

The MySQL Improved extension in PHP, more commonly known as MySQLi, provides a API to work with prepared statements. The documentation at the online PHP manual is good enough to get you started on how to use them on your PHP application, so I'll not go through it. Instead, I am going to share the results of my personal experiments on comparing performances of traditional and prepared SQL statements.

I conducted the experiment after the launch of Quizfarm. Quizfarm is a heavily trafficked site where users create and run quizzes. I wrote two separate scripts on our development server, both of which performed the same operation: selecting the quiz ID, quiz name and username of the quiz creator of all quizzes by joining the 'quiz' table (which had over 150,000 records) and the user table(over 350,000 records). One script used regular SQL statement, the other employed prepared statement techniques. Each script was executed three times and the time required to fetch the data was measured at each pass.

The First script: traditional SQL statement

//Get the Database link
$dbLink = getDBLink();

$timeStart = microtime(true);

for($i = 0; $i < 162038; $i++){

$query = "SELECT quiz_id, quiz_name, username as author FROM quiz q LEFT JOIN user u ON (q.owner_id = u.user_id) WHERE quiz_id = $i";

if($result = $dbLink->query($query))
$obj = $result->fetch_object();

else die("Failed to execute query: $dbLink->error");

$result->close();

}

$timeEnd = microTime(true);
$dbLink->close();

//measure the time difference
$timeDiff = $timeEnd - $timeStart;

echo "Total time: $timeDiff seconds";

Output:

First Pass -> Total time: 25.5793459415 seconds
Second Pass -> Total time: 25.1708009243 seconds
Third Pass -> Total time: 25.2259421349 seconds

Average: 25.32536300023 seconds

The Second Script : using prepared statement

$dbLink = getDBLink();

$query = "SELECT quiz_id, quiz_name, username as author FROM quiz q LEFT JOIN user u ON (q.owner_id = u.user_id) WHERE quiz_id = ?";

$stmt = $dbLink->stmt_init();

if(!$stmt->prepare($query))
die("Failed to prepare statement: ".$dbLink->error);

$timeStart = microtime(true);

for($i = 0; $i < 162038; $i++) {

$stmt->bind_param('i',$i);
$stmt->execute();
$stmt->bind_result($quizId, $quizName, $author);
$stmt->fetch();
$stmt->free_result();

}

$timeEnd = microTime(true);

$stmt->close();
$dbLink->close();

$timeDiff = $timeEnd - $timeStart;

echo "Total time: $timeDiff seconds";

Output:

First Pass -> Total time: 20.1434290409 seconds
Second Pass -> Total time: 20.182309866 seconds
Third Pass -> Total time: 20.6448199749 seconds

Average: 20.32351962726 seconds

The task takes 20% less time for prepared statement, a significant performance boost.

Other than performance, it can also improve application security by guarding against SQL Injections. Check out this informative blog post on that topic.

Harrison Fisk at MySQL AB wrote a very good article on MySQL prepared statements. Don't forget to check out the section 'When should you use prepared statement?' if you read it.

Enhancements in this release:

• Made signup 1-step using your Nike+ login.  This removes the need to use the "Share with friend" link from within Nike+.
• Added pulldown menu to set default distance metric (km/mi) on your Twitter settings. This is now used for any runs published.  It's initially set based on your Nike+ user preferences.
• Added the user tweets to the Twiike timeline to drive additional traffic for Twiike users
• Added retrieve your password (which is set to your Nike+ password when you sign up).
• Added ajax progress bars to all functions that require the server to respond so users don't think the site is not doing anything

Please keep it coming with the suggestions.  I received a ton today and would love to know how to keep making it better for users.

The problem with making anything a solitary factor more expandable is that it increases the complexity required to interface with that feature by at least twice that factor — twice in the sense that time and complexity, remember them?, are lower-bounded to being capable of handling the expansion.

Case in point: The difference between a pre-populated list and one whose values are variant depending on which portions of a codebase are considered "active." This can pose quite the problem depending on how mission-critical this list is. (After all, this is a science; and all science should be repeatable ad infinity.) But how to retain this ability to accept a near-infinite range of values and manage them in some human-readable way?

Here we find the strengths and weaknesses of a language. In C, everything you touch is memory whether you realize it or not. From byte-pointers to malloc-ed blocks of hard disk, C keeps you up to your elbows in references. Perl scales the complexity back by a good factor, but grabbing references is still do-able: $ref = \$scalar is a direct accessor to the memory allocated by $scalar; and conversely, $val = $$ref gets the value of whatever variable resides at the memory location $ref. Pretty handy if you have an unknown-length set of variables with similar names. Now we have a common variable name we can manipulate without having a half-dozen Eval() functions in our code. (Aside: Eval() is nice, but sneakily evil; it's slow, offers arbitrary code execution if use improperly, and just plain ugly.) Our syntax highlighters can show us exactly what we meant, and in six months when we'll use this as the basis for the program's next feature, we'll have a much clearer idea of what the hell we wanted to get out of it.

But this is Perl. How do we do this in a language which masks references like PHP? Unfortunately, we can't go flying around the memory stack as easily as Perl does, but we can get pretty close with a single Eval(). (Aside 2: I know, I just got done bashing Eval(); I haven't forgotten, but we're in control of the string this code evaluates, so take a breath.)

PHP offers an arguably more elegant Eval() than most languages, the inline eval. So let's reassume our situation: an unknown number of similarly-named variables is in our module's scope and we want an elegant, memorable way to access their values for modulation.
In Perl:
$value_1 = "some important value";
for($i=1; $i < $some_known_upper_bound; $i++) {
$value_variable_name = "value_" . $i;
$value = $$value_variable_name;
# some modulator code
}

In PHP:
$value_1 = "some important value";
for($i = 1; $i < $some_known_upper_bound; $i++) {
$value_variable_name = "value_" . $i;
# the magic...
$value = ${$value_variable_name};
# some modulator code
}

And there you have it. Future proof code that modifies a like-named set of variables with a single, easily understood and aptly named variable.

1. Download và cài đặt CakePhp 1.2x

2. Download Prototype

3. Cấu hình cho Json

3. Một ví dụ đơn giản.

To be continous ...

• hosting your own website, bulletin board, or blog
• giving people read-only downloads (can be password protected!) to files
• testing new versions of existing websites before they go live, without requiring an Internet connection, which even includes developing Facebook applications
• run your own instance of Wordpress
• a great way to familiarize yourself with developing and deploying web applications

• Becoming reasonable at a scripting language, either PHP or Python
• Working with XMPP / Jabber
• Working with the OpenMicroBlogging platform, and other Open protocols (OAuth, OpenID)
• Create a fully-fledged web service

I certainly hope you enjoy the ride!

Os pido e invito a que añadáis vuestras propias funciones útiles o reutilizables en los comentarios.

Define una tabla sql con parejas campo-valor como constantes de php. Una entrada de ejemplo válida podría ser : "select campo,valor from constantes"

function definir_constante_sql($sql)
{
	$resultado=mysql_query($sql);
	if($resultado)
	{
		while($array=mysql_fetch_row($resultado))
		{
			define($array[0],$array[1]);
		}
	}
	else
	{
		echo "ERROR Grave , no se pudieron cargar las constantes";
		exit;
	}
}

Nos devuelve un número de filas al azar de la tabla indicada.

function dame_unas_filas_al_azar($tabla,$numero_de_filas)
{
$sql="SELECT * FROM ".$tabla." ORDER BY RAND(NOW()) LIMIT ".$numero_de_filas;
$resultado = mysql_query($sql);
	if($resultado)
	{
		return $resultado;
	}
	else
	{
		return false;
	}
}

Devuelve el último ID de una tabla, usaba esto hasta que conocí mysql_last_id() -_-

function ultimo_id($tabla,$campo)
{
$sql="SELECT max(".$campo.") AS maximo FROM `".$tabla."`";
$resultado=mysql_query($sql);
	if($resultado)
	{
		$array=mysql_fetch_array($resultado);
		$id_auto_asignado=$array['maximo'];
		return $id_auto_asignado;
	}
	else
	{
		return 0;
	}
}

Nos dice si un valor existe.

function si_existe_en_la_tabla($tabla,$campo,$valor)
{
	$tabla=mysql_escape_string($tabla);
	$campo=mysql_escape_string($campo);
	$valor=mysql_escape_string($valor);
	$sql="select ".$campo." from ".$tabla." where ".$campo."=".$valor;
	return (mysql_query($sql) && (mysql_num_rows($resultado)>0));
}

Comprueba si vienes de la página pasada por parametro. OJO! No todos los navegadores definen HTTP_REFERER (ni tienen obligación de hacerlo), con todas las consecuencias que ello supone.

function vienesDe($pagina)
{
	return strrchr($_SERVER['HTTP_REFERER'],"/") == "/".$pagina;
}

Coge el valor del campo de una sql que devuelve al menos una fila.

function coger_valor($sql,$campo)
{
	$resultado=mysql_query($sql);
	if($resultado)
	{
		$array=mysql_fetch_array($resultado);
		$valor=$array[$campo];
		return $valor;
	}
	else
	{
		return false;
	}
}

Metido al principio, evita que el navegador use cache

function no_coge_de_cache()
{
	header("Expires: Mon, 1 Jul 1900 00:00:00 GMT");
	header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
	header("Cache-Control: no-cache, must-revalidate");
	header("Pragma: no-cache");
}

Genera un color aleatorio hexadecimal

function generar_color()
{
	$r=rand(0,255);
	$g=rand(0,255);
	$b=rand(0,255);
	$color="#".dechex($r).dechex($g).dechex($b);
	return $color;
}

Vacia una tabla !! para mysql 3.x o 4.x, en mysql 5.x esto es equivalente a TRUNCATE 'tabla'

function vaciar_tabla($tabla)
{
	$sql="DELETE FROM `".$tabla."`";mysql_query($sql);
	$sql="ALTER TABLE `".$tabla."` PACK_KEYS =0 CHECKSUM =0 DELAY_KEY_WRITE =0 AUTO_INCREMENT =1";mysql_query($sql);
}

Redirecciona por javascript, en lugar de por header(Location : pagina.php).

function redireccionarPorJavascript($nuevaURL)
{
	echo '<script type="text/javascript">';
	echo 'location.href="'.$nuevaURL.'"';
	echo '</script>';
}

Capitaliza una palabra

function capitalizar($palabra)
{
	return ucfirst(strtolower($palabra));
}

Si tenemos tablas definidas con enumerado podemos obtener un array de ese enumerado con esta función, la sintaxis es tabla.columna

/*
$array = enum("tabla.columna");
*/
function enum($objeto)
{
	list($tabla, $columna) = explode(".", $objeto);
	$fila=@mysql_fetch_assoc(mysql_query("SHOW COLUMNS FROM ".$tabla." LIKE
	'".$columna."'"));
	return ($fila ? explode("','",preg_replace("/(enum|set)\('(.+?)'\)/","\\2",$fila['Type'])) : array(0=>'None'));
}

Nos dice si una definición esta definida.

function estaDefinido($var)
{
	return (isset($var) || $var != "" || $var != null || strlen($var)>0);
}

Borra un registro

function borrarRegistro($tabla , $nombreCampoClave , $valorCampoClave)
{
	$sql="DELETE FROM `".$tabla."` WHERE `".$nombreCampoClave."` = '".$valorCampoClave."' LIMIT 1;";
	return mysql_query($sql);
}

Actualiza un campo

function actualizar_campo($tabla , $nombreCampoUnico , $valorCampoUnico , $nombreColumna , $nuevoValorColumna)
{
	$sql="UPDATE `".$tabla."` SET `".$nombreColumna."` = '".$nuevoValorColumna."' WHERE `".$nombreCampoUnico."` = '".$valorCampoUnico."' LIMIT 1 ;";
	return mysql_query($sql);
}

Ver las "superglobales" definidas.

function versupervariables()
{
	echo "_COOKIE";
	foreach($_COOKIE as $clave=>$valor)
	{
		echo $clave." = ".$valor."";
	}
	echo "_ENV";
	foreach($_ENV as $clave=>$valor)
	{
		echo $clave." = ".$valor."";
	}
	echo "_FILES";
	foreach($_FILES as $clave=>$valor)
	{
		echo $clave." = ".print_r($valor)."";
	}
	echo "_GET";
	foreach($_GET as $clave=>$valor)
	{
		echo $clave." = ".$valor."";
	}
	echo "_POST";
	foreach($_POST as $clave=>$valor)
	{
		echo $clave." = ".$valor."";
	}
	echo "_REQUEST";
	foreach($_REQUEST as $clave=>$valor)
	{
		echo $clave." = ".$valor."";
	}
	echo "_SESSION";
	foreach($_SESSION as $clave=>$valor)
	{
		echo $clave." = ".$valor."";
	}
	echo "_SERVER";
	foreach($_SERVER as $clave=>$valor)
	{
		echo $clave." = ".$valor."";
	}
}

Acota una palabra con puntos suspensivos.

function acotar($palabra , $cantidadDeseada , $porDelante = false)
{
	$sufijo = "...";
	if(strlen($palabra)>$cantidadDeseada)
	{
		if($porDelante)
		{
			return $sufijo.substr($palabra,strlen($palabra)-$cantidadDeseada,strlen($palabra)-1);
		}
		else
		{
			return substr($palabra,0,$cantidadDeseada-strlen($sufijo)).$sufijo;
		}
	}
	else
	{
		return $palabra;
	}
}

Si el valor de un GET es numero ---> bool

function porElGETvieneUnNumero($nombre)
{
	return (isset($_GET[$nombre]) && $_GET[$nombre]!="" && is_numeric($_GET[$nombre]));
}

Esta función recibe un timestamp he imprime hace cuando fue esa fecha adaptandose al mejor periodo de tiempo posible. Por ejemplo "Por ejemplo: Hace 3 dias"

function hace($timestamp)
{
	$diferencia = time() - $timestamp;
	if($diferencia > 0)
	{
		$periodo = array("seg", "min", "hora", "dia", "semana", "mes" , "año", "decada");
		$longitud = array(    "60" ,"60"  , "24" ,  "7"  , "4.35",   "12" , "10" );

		for($j = 0; $diferencia >= $longitud[$j]; $j++)
			$diferencia /= $longitud[$j];

		$diferencia = round($diferencia);

		if($diferencia != 1)
		{
			if($periodo[$j] == "mes")
				$periodo[$j].= "es";
			else
				$periodo[$j].= "s";
		}

		return "Hace ".$diferencia." ".$periodo[$j];
	}
	else
	{
		return "Ahora mismo";
	}
}

Nos dice si un año es bisiesto

function esBisiesto($ano)
{
	// El dia y el mes me lo invento por que no interesa
	return (date("L",strtotime($ano."-2-28")) == 1);
}

Nos dice el limite de un mes, teniendo en cuanta bisiestos con la función anterior

function getLimiteMes($mes,$ano)
{
	switch($mes)
	{
		case 1:
		case 3:
		case 5:
		case 7:
		case 8:
		case 10:
		case 12:
			return 31;
		break;

		case 2:
			if(esBisiesto($ano))
			{return 29;}
			else
			{return 28;}
		break;

		case 4:
		case 6:
		case 9:
		case 11:
		default:
			return 30;
		break;
	}
}

Replication

Replication enables data from one MySQL database server (called the master) to be replicated to one or more MySQL database servers (slaves). Replication is asynchronous - your replication slaves do not need to be connected permanently to receive updates from the master, which means that updates can occur over long-distance connections and even temporary solutions such as a dial-up service. Depending on the configuration, you can replicate all databases, selected databases, or even selected tables within a data.

Solar Adapter

When you get into a situation where you need to scale up, you might need a replicated MySQL database setup. In such cases, there is one "master" server that handles reads and writes, and there are one or more "slave" servers that are read-only. This means you need to pick which server you're going to connect to based on the kind of statement you need to issue (SELECT, INSERT, UPDATE, etc).

The Solar_Sql_Adapter_MysqlReplicated adapter handles all the connections and switching-around for you, and you don't need change a single line of application code. All you need to do is modify your configuration file to tell it where your master and slave servers are.

More: Adapter for Master/Slave MySQL Setups

Related Links

• Step-by-step: How to setup MySQL Database replication
• MySQL Replication
• Jayson Minard: Scaling Day-By-Day

I'm lazy when I code. By lazy I mean I detest retyping the same several codes of line multiple times throughout an app. My motto is (usually) if I have to use a/several line(s) more than 3 times it becomes a function so I can use and re-use it.

If you're like me, when you use the form features in CI you set up the controller part like so:


if($this->validation->run() == FALSE) {
$data["variable"] = "something";
$this->load->view("view_template",$data);
} else {
$process = $this->model_name->model_function($this->validation->variable);
//Success / error message here
}

That (extremely simple) example uses only 7 lines of code. However, if you have an add + edit function in each controller and you have 10 controllers, that's (7+7)*10 = 140 lines that are really similar. I hear a function calling my name!

With the function I created I took those six lines of code and reduced them to this:
$this->library_name->validation_run("model_name","model_function",$this->validation->variable,"view_template",array("variable"=>"something");

Pretty sweet, no? :)

Below is the function. I am assuming you have a basic to intermediate understanding of CI, so I won't go into a lot of depth explaining it. I placed validation_run in the custom forms library I use. You can use it in your own custom library or create a library out of it. If you put it in your own library, ensure that the method you are using to reference CI functions is reflected in validation_run ($this->obj,$ci,$this->ci, etc). Also ensure that the Validation and Model are loaded prior to calling validation_run.

function validation($model_name,$model_function,$model_function_variable,$layout_template,$data_array=NULL)
{
if($this->ci->validation->run() == FALSE) {
//This allows the view to be called with or without parameters.
if(!is_null($data_array)) {
$this->ci->load->view($layout_template,$data_array);
} else {
$this->ci->load->view($layout_template);
}
} else {
$process = $this->ci->$model_name->$model_function($model_function_variable);
//Use your favorite redirection method here
}
}

To use it, you'd simply call

$this->library_name->validation_run("model_name","model_function",$this->validation->variable,"view_template",array("variable"=>"something");

For better readability you could do alternatively do it this way:

$this->library_name->validation_run(
"model_name",
"model_function",
$this->validation->variable,
"view_template",
array("variable"=>"something"
);

Of course, you'd replace library_name with the library name you called it from.

Not everyone will have a use for this function; it's really only good for simple validation "running" . However, it's saved me so much time coding that I had to share it :)

Enjoy!

function duration($start,$end){
$tmp_e = explode(":",$end);
$tmp_s = explode(":",$start);
$start_time = mktime($tmp_s[0],$tmp_s[1],$tmp_s[2],8,8,8);
$end_time = mktime($tmp_e[0],$tmp_e[1],$tmp_e[2],8,8,8);
$durationt = $end_time-$start_time;
$hrs = intval(floor($durationt/3600));
$min = intval(floor($durationt/60))-($hrs*60);
if($hrs<>0){
$rval = $hrs.' hr';
}
if($min<>0){
if($hrs<>0){
$rval .= ' & '.$min.' min';
} else {
$rval = $min.' min';
}
}
return $rval;
}

How to use it:

$timeOne ='12:31';

$timeTwo = '15:43';

echo duration($timeOne,$timeTwo); //output: 3 hours & 12 min