/** * "Minify" an HTML page * * @param string $html * * @param array $options * * 'cssMinifier' : (optional) callback function to process content of STYLE * elements. * * 'jsMinifier' : (optional) callback function to process content of SCRIPT * elements. Note: the type attribute is ignored. * * 'xhtml' : (optional boolean) should content be treated as XHTML1.0? If * unset, minify will sniff for an XHTML doctype. * * @return string */ public static function minify($html, $options = array()) { if (isset($options['cssMinifier'])) { self::$_cssMinifier = $options['cssMinifier']; } if (isset($options['jsMinifier'])) { self::$_jsMinifier = $options['jsMinifier']; } self::$_isXhtml = isset($options['xhtml']) ? (bool) $options['xhtml'] : false !== strpos($html, '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML'); self::$_replacementHash = 'MINIFYHTML' . md5(time()); self::$_placeholders = array(); // replace SCRIPTs (and minify) with placeholders $html = preg_replace_callback('/\\s*(<script\\b[^>]*?>)([\\s\\S]*?)<\\/script>\\s*/i', array(self::$className, '_removeScriptCB'), $html); $html = str_replace("\r", "", trim($html)); $html = str_replace("\n", "", trim($html)); // replace STYLEs (and minify) with placeholders $html = preg_replace_callback('/\\s*(<style\\b[^>]*?>)([\\s\\S]*?)<\\/style>\\s*/i', array(self::$className, '_removeStyleCB'), $html); // remove HTML comments (not containing IE conditional comments). $html = preg_replace_callback('/<!--([\\s\\S]*?)-->/', array(self::$className, '_commentCB'), $html); // replace PREs with placeholders $html = preg_replace_callback('/\\s*(<pre\\b[^>]*?>[\\s\\S]*?<\\/pre>)\\s*/i', array(self::$className, '_removePreCB'), $html); // replace TEXTAREAs with placeholders $html = preg_replace_callback('/\\s*(<textarea\\b[^>]*?>[\\s\\S]*?<\\/textarea>)\\s*/i', array(self::$className, '_removeTaCB'), $html); // trim each line. $html = preg_replace('/^\\s+|\\s+$/m', '', $html); // remove ws around block/undisplayed elements $html = preg_replace('/\\s+(<\\/?(?:area|base(?:font)?|blockquote|body' . '|caption|center|cite|col(?:group)?|dd|dir|div|dl|dt|fieldset|form' . '|frame(?:set)?|h[1-6]|head|hr|html|legend|li|link|map|menu|meta' . '|ol|opt(?:group|ion)|p|param|t(?:able|body|head|d|h||r|foot|itle)' . '|ul)\\b[^>]*>)/i', '$1', $html); // remove ws outside of all elements $html = preg_replace_callback('/>([^<]+)</', array(self::$className, '_outsideTagCB'), $html); // use newlines before 1st attribute in open tags (to limit line lengths) //$html = preg_replace('/(<[a-z\\-]+)\\s+([^>]+>)/i', "$1\n$2", $html); $html = preg_replace('/(<[a-z\\-]+)\\s+([^>]+>)/i', "\$1 \$2", $html); // fill placeholders $html = str_replace(array_keys(self::$_placeholders), array_values(self::$_placeholders), $html); self::$_placeholders = array(); self::$_cssMinifier = self::$_jsMinifier = null; return $html; }