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✎ Editing: Pixels.php ← Back

<?php

/**

* Validates an integer representation of pixels according to the HTML spec.

class HTMLPurifier_AttrDef_HTML_Pixels extends HTMLPurifier_AttrDef

{

/**

* @type int

protected $max;

/**

* @param int $max

public function __construct($max = null)

{

$this->max = $max;

}

/**

* @param string $string

* @param HTMLPurifier_Config $config

* @param HTMLPurifier_Context $context

* @return bool|string

public function validate($string, $config, $context)

{

$string = trim($string);

if ($string === '0') {

return $string;

}

if ($string === '') {

return false;

}

$length = strlen($string);

if (substr($string, $length - 2) == 'px') {

$string = substr($string, 0, $length - 2);

}

if (!is_numeric($string)) {

return false;

}

$int = (int)$string;

if ($int < 0) {

return '0';

}

// upper-bound value, extremely high values can

// crash operating systems, see <http://ha.ckers.org/imagecrash.html>

// WARNING, above link WILL crash you if you're using Windows

if ($this->max !== null && $int > $this->max) {

return (string)$this->max;

}

return (string)$int;

}

/**

* @param string $string

* @return HTMLPurifier_AttrDef

public function make($string)

{

if ($string === '') {

$max = null;

} else {

$max = (int)$string;

}

$class = get_class($this);

return new $class($max);

}

// vim: et sw=4 sts=4

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