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AttrTransform
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ImgRequired.php
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<?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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