php_parser.php
public function addPattern($pattern, $mode = 'accept')
    {
        if (! isset($this->regexes[$mode])) {
            $this->regexes[$mode] = new ParallelRegex($this->case);
        }
        $this->regexes[$mode]->addPattern($pattern);
        if (! isset($this->mode_handlers[$mode])) {
            $this->mode_handlers[$mode] = $mode;
        }
    }
public function addPattern($pattern, $mode = 'accept')
    {
        if (! isset($this->regexes[$mode])) {
            $this->regexes[$mode] = new ParallelRegex($this->case);
        }
        $this->regexes[$mode]->addPattern($pattern);
        if (! isset($this->mode_handlers[$mode])) {
            $this->mode_handlers[$mode] = $mode;
        }
    }
Adds a token search pattern for a particular parsing mode.
The pattern does not change the current mode.

@param string $pattern      Perl style regex, but ( and ) lose the usual meaning.
@param string $mode         Should only apply this pattern when dealing with this type of
input.