src/Preg.php
public static function match($pattern, $subject, &$matches = null, $flags = 0, $offset = 0)
    {
        $result = @preg_match(self::addUtf8Modifier($pattern), $subject, $matches, $flags, $offset);
        if (false !== $result && PREG_NO_ERROR === preg_last_error()) {
            return $result;
        }

        $result = @preg_match(self::removeUtf8Modifier($pattern), $subject, $matches, $flags, $offset);
        if (false !== $result && PREG_NO_ERROR === preg_last_error()) {
            return $result;
        }

        throw new PregException('Error occurred when calling preg_match.', preg_last_error());
    }
public static function match($pattern, $subject, &$matches = null, $flags = 0, $offset = 0)
    {
        $result = @preg_match(self::addUtf8Modifier($pattern), $subject, $matches, $flags, $offset);
        if (false !== $result && PREG_NO_ERROR === preg_last_error()) {
            return $result;
        }

        $result = @preg_match(self::removeUtf8Modifier($pattern), $subject, $matches, $flags, $offset);
        if (false !== $result && PREG_NO_ERROR === preg_last_error()) {
            return $result;
        }

        throw new PregException('Error occurred when calling preg_match.', preg_last_error());
    }
@param string        $pattern
@param string        $subject
@param null|string[] $matches
@param int           $flags
@param int           $offset

@throws PregException

@return int