Как проверить форму

Здравствуйте! Кто поможет, как проверить форму на такое рег выражение №и любые 4 цифры вместо проверки email


<?php

class Comment
{
private $data = array();

public function __construct($row)
{
/*
/ The constructor
*/

$this->data = $row;
}

public function markup()
{
/*
/ This method outputs the XHTML markup of the comment
*/

// Setting up an alias, so we don't have to write $this->data every time:
$d = &$this->data;

$link_open = '';
$link_close = '';

if($d['url']){

// If the person has entered a URL when adding a comment,
// define opening and closing hyperlink tags

$link_open = '<a href="'.$d['url'].'">';
$link_close = '</a>';
}

// Converting the time to a UNIX timestamp:
$d['dt'] = strtotime($d['dt']);

// Needed for the default gravatar image:
$url = 'http://'.dirname($_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]).'/img/default_avatar.gif';

return '

<div class="comment">
<div class="avatar">
'.$link_open.'
<img src="http://www.gravatar.com/avatar/'.md5($d['email']).'?size=50&amp;default='.urlencode($url).'" />
'.$link_close.'
</div>

<div class="name">'.$link_open.$d['name'].$link_close.'</div>
<div class="date" title="Added at '.date('H:i \o\n d M Y',$d['dt']).'">'.date('d M Y',$d['dt']).'</div>
<p>'.$d['body'].'</p>
</div>
';
}

public static function validate(&$arr)
{
/*
/ This method is used to validate the data sent via AJAX.
/
/ It return true/false depending on whether the data is valid, and populates
/ the $arr array passed as a paremter (notice the ampersand above) with
/ either the valid input data, or the error messages.
*/

$errors = array();
$data = array();

// Using the filter_input function introduced in PHP 5.2.0

if(!($data['email'] = filter_input(INPUT_POST,'email',FILTER_VALIDATE_EMAIL)))
{
$errors['email'] = 'Please enter a valid Email.';
}

if(!($data['url'] = filter_input(INPUT_POST,'url',FILTER_VALIDATE_URL)))
{
// If the URL field was not populated with a valid URL,
// act as if no URL was entered at all:

$url = '';
}

// Using the filter with a custom callback function:

if(!($data['body'] = filter_input(INPUT_POST,'body',FILTER_CALLBACK,array('options'=>'Comment::validate_text'))))
{
$errors['body'] = 'Please enter a comment body.';
}

if(!($data['name'] = filter_input(INPUT_POST,'name',FILTER_CALLBACK,array('options'=>'Comment::validate_text'))))
{
$errors['name'] = 'Please enter a name.';
}

if(!empty($errors)){

// If there are errors, copy the $errors array to $arr:

$arr = $errors;
return false;
}

// If the data is valid, sanitize all the data and copy it to $arr:

foreach($data as $k=>$v){
$arr[$k] = mysql_real_escape_string($v);
}

// Ensure that the email is lower case:

$arr['email'] = strtolower(trim($arr['email']));

return true;

}

private static function validate_text($str)
{
/*
/ This method is used internally as a FILTER_CALLBACK
*/

if(mb_strlen($str,'utf8')<1)
return false;

// Encode all html special characters (<, >, ", & .. etc) and convert
// the new line characters to <br> tags:

$str = nl2br(htmlspecialchars($str));

// Remove the new line characters that are left
$str = str_replace(array(chr(10),chr(13)),'',$str);

return $str;
}

}

?>

 

А по подробнее?

 

Это я понял, как вместо email проверить. Т.е. убрать проверку email полностью и написать проверку на рег выражение

 

Вы на примере можете показать

 

А форум для чего тогда? Или здесь все все знают, и ни кто не может помочь