$re = '/((^090)([23589]))|((^070)([1-9]))|((^080)([2-9]))|((^081)([0-9]))(\d{7})/';
$str = '08121434763';
preg_match($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