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38 lines
1.2 KiB
PHP
38 lines
1.2 KiB
PHP
<?php namespace App\Libraries;
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use HTMLPurifier;
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use HTMLPurifier_Config;
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class HTMLUtils
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{
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public static function sanitize($css)
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{
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// Allow referencing the body element
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$css = preg_replace('/(?<![a-z0-9\-\_\#\.])body(?![a-z0-9\-\_])/i', '.body', $css);
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//
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// Inspired by http://stackoverflow.com/a/5209050/1721527, dleavitt <https://stackoverflow.com/users/362110/dleavitt>
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//
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// Create a new configuration object
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$config = HTMLPurifier_Config::createDefault();
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$config->set('Filter.ExtractStyleBlocks', true);
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$config->set('CSS.AllowImportant', true);
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$config->set('CSS.AllowTricky', true);
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$config->set('CSS.Trusted', true);
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// Create a new purifier instance
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$purifier = new HTMLPurifier($config);
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// Wrap our CSS in style tags and pass to purifier.
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// we're not actually interested in the html response though
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$purifier->purify('<style>'.$css.'</style>');
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// The "style" blocks are stored seperately
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$css = $purifier->context->get('StyleBlocks');
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// Get the first style block
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return count($css) ? $css[0] : '';
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}
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}
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