Ticket #16635: wp_match_mime_types.txt

function wp_match_mime_types($wildcard_mime_types, $real_mime_types) {
        $matches = array();
        if ( is_string($wildcard_mime_types) )
                $wildcard_mime_types = array_map('trim', explode(',', $wildcard_mime_types));
        if ( is_string($real_mime_types) )
                $real_mime_types = array_map('trim', explode(',', $real_mime_types));
        
        $combined_types = array();
        $temp_types = array();
        foreach ( (array) $wildcard_mime_types as $k => $type ) {
                if(false !== strpos($type, ',')) {
                        $subtypes = array_map('trim', explode(',', $type));
                        foreach($subtypes as $subtype) {
                                $temp_types[] = $subtype;
                                $combined_types[$subtype] = $type;
                        }
                } else {
                        $combined_types[$type] = $type;
                }
        }
        $wildcard_mime_types = array_merge($wildcard_mime_types, $temp_types);
        
        $wild = '[-._a-z0-9]*';
        foreach ( (array) $wildcard_mime_types as $type ) {
                $type = str_replace('*', $wild, $type);
                $patternses[1][$type] = "^$type$";
                if ( false === strpos($type, '/') ) {
                        $patternses[2][$type] = "^$type/";
                        $patternses[3][$type] = $type;
                }
        }
        asort($patternses);
        foreach ( $patternses as $patterns )
                foreach ( $patterns as $type => $pattern )
                        foreach ( (array) $real_mime_types as $real )
                                if ( preg_match("#$pattern#", $real) && ( empty($matches[$type]) || false === array_search($real, $matches[$type]) ) )
                                        $matches[$combined_types[$type]][] = $real;
        return $matches;
}