Online PHP editor | refs for 4MHGa

@ 2019-10-17T12:57:18Z

<?php

$regex = '/(?J)TXT(?<number>[0-9]+)|(?<number>[0-9]+)TXT/';
if (preg_match_all($regex, "TXT123 and 456TXT1", $matches, PREG_SET_ORDER, 0)) {
    foreach ($matches as $m) {
        echo $m["number"] . PHP_EOL;
    }
}