<?php
$string = "This is an example string that we will replace";
$new_string = regex($string);
echo $new_string;
function regex($text) {
$array = array('#ex.*ple#', '#a[nt]#'); return $text;
}
PD9waHAKCiRzdHJpbmcgPSAiVGhpcyBpcyBhbiBleGFtcGxlIHN0cmluZyB0aGF0IHdlIHdpbGwgcmVwbGFjZSI7CiRuZXdfc3RyaW5nID0gcmVnZXgoJHN0cmluZyk7CmVjaG8gJG5ld19zdHJpbmc7CgpmdW5jdGlvbiByZWdleCgkdGV4dCkgewogICAgJGFycmF5ID0gYXJyYXkoJyNleC4qcGxlIycsICcjYVtudF0jJyk7CiAgICAkdGV4dCA9IHByZWdfcmVwbGFjZSgkYXJyYXksICcnLCAkdGV4dCk7CiAgICByZXR1cm4gJHRleHQ7Cn0=