Online PHP editor | refs for R4JSN

@ 2017-06-13T07:52:18Z

<?php

$string = 'ditiseentest';

$length = 4;

$expected = [
    'diti',
    'itis',
    'tise',
    'isee',
    'seen',
    'eent',
    'ente',
    'ntes',
    'test'
    ];
    
for($i=0;$i<strlen($string);$i++) {
    echo substr($string, $i, $length) . "\r\n";
}