$re = '/^(\+7|8)(\s|-)?(\()?[0-9]{3}(\))?(\s|-)?([0-9]{3})(\s|-)?([0-9]{2})(\s|-)?([0-9]{2})$/m';
$str = '+79295002639
8 929 500 2639
+7 (929) 500 26-39
8 (929) 500 2639
8-9295002639
8478393
65748499
fkjhkhfs75768
+75836fjhgdlhg
[?:+7|8][?:\\s|\\-]\\(?[0-9]{3}\\)?[?:\\s|\\-][0-9]{3}[?:\\s|\\-][0-9]{2}[?:\\s?|\\-][0-9]{2}';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($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