protected function extractDefaultValues(
        /*# string */ $pattern
    )/*# : string */ {
        $regex = '~\{([a-zA-Z][a-zA-Z0-9_]*+)[^\}]*(=[a-zA-Z0-9._]++)\}~';
        if (preg_match_all($regex, $pattern, $matches, \PREG_SET_ORDER)) {
            $srch = $repl = $vals = [];
            foreach ($matches as $m) {
                $srch[] = $m[0];
                $repl[] = str_replace($m[2], '', $m[0]);
                $vals[$m[1]] = substr($m[2],1);
            }
            $this->setDefault($vals);
            return str_replace($srch, $repl, $pattern);
        }
        return $pattern;
    }
protected function extractDefaultValues(
        /*# string */ $pattern
    )/*# : string */ {
        $regex = '~\{([a-zA-Z][a-zA-Z0-9_]*+)[^\}]*(=[a-zA-Z0-9._]++)\}~';
        if (preg_match_all($regex, $pattern, $matches, \PREG_SET_ORDER)) {
            $srch = $repl = $vals = [];
            foreach ($matches as $m) {
                $srch[] = $m[0];
                $repl[] = str_replace($m[2], '', $m[0]);
                $vals[$m[1]] = substr($m[2],1);
            }
            $this->setDefault($vals);
            return str_replace($srch, $repl, $pattern);
        }
        return $pattern;
    }
protected function extractDefaultValues ( /*# string */ $ pattern ) /*# : string */ { $ regex = '~\{([a-zA-Z][a-zA-Z0-9_]*+)[^\}]*(=[a-zA-Z0-9._]++)\}~' ; if ( preg_match_all ( $ regex , $ pattern , $ matches , \ PREG_SET_ORDER ) ) { $ srch = $ repl = $ vals = [ ] ; foreach ( $ matches as $ m ) { $ srch [ ] = $ m [ 0 ] ; $ repl [ ] = str_replace ( $ m [ 2 ] , '' , $ m [ 0 ] ) ; $ vals [ $ m [ 1 ] ] = substr ( $ m [ 2 ] , 1 ) ; } $ this -> setDefault ( $ vals ) ; return str_replace ( $ srch , $ repl , $ pattern ) ; } return $ pattern ; }
Extract default values from the pattern

@param  string $pattern
@return string
@access protected
Extract default values from the pattern