Format To RegEx String

formatToRegex.php

<?php

function formatToRegex(string $format): string {
    $result = preg_quote($format, '/');
    $result = str_replace('%d', '\d+', $result);
    $result = str_replace('%s', '[^\r\n]+', $result);
    return "/^$result$/s";
}

$output = "Mr. Jones";
var_dump(formatToRegex($output));

/*
string(15) "/^Mr\. Jones$/s"
*/