$re = '/\b\w*[A-Za-z]\w*\b/m';
$str = 'Hello world one 12345w more 12345 of the 789 same wor123ld
he11o
123
wor123
123world';
preg_match_all($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