Online PHP editor | refs for tLH7B

@ 2016-09-07T16:47:01Z

<?php

$lines = array(
    "0123333333",
    "asdfasfasdf",
    "01234555555"
);

foreach($lines as $line){
    $len = strlen($line);
    if(($len==10||$len==11)&&"0123"===substr($line, 0, 4))
        echo "valid: $line \n";
}