$re = '/^((((\+972)|0)(([234689]\d{7})|([57]\d{8}))|(1[5789]\d{8}))|\*\d{3,6})$/';
$str = '1700709100';
preg_match($re, $str, $matches, PREG_OFFSET_CAPTURE, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php