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✎ Editing: ImgRequired.php ← Back

<?php

// must be called POST validation

/**

* Transform that supplies default values for the src and alt attributes

* in img tags, as well as prevents the img tag from being removed

* because of a missing alt tag. This needs to be registered as both

* a pre and post attribute transform.

class HTMLPurifier_AttrTransform_ImgRequired extends HTMLPurifier_AttrTransform

{

/**

* @param array $attr

* @param HTMLPurifier_Config $config

* @param HTMLPurifier_Context $context

* @return array

public function transform($attr, $config, $context)

{

$src = true;

if (!isset($attr['src'])) {

if ($config->get('Core.RemoveInvalidImg')) {

return $attr;

}

$attr['src'] = $config->get('Attr.DefaultInvalidImage');

$src = false;

}

if (!isset($attr['alt'])) {

if ($src) {

$alt = $config->get('Attr.DefaultImageAlt');

if ($alt === null) {

// truncate if the alt is too long

$attr['alt'] = substr(basename($attr['src']), 0, 40);

} else {

$attr['alt'] = $alt;

}

} else {

$attr['alt'] = $config->get('Attr.DefaultInvalidImageAlt');

}

return $attr;

}

// vim: et sw=4 sts=4

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