- var_dump: documentation ( source)
<?php
$counter = 0;
while (true) {
$counter++;
if(($counter % 17) === 0) {
$counterStr = "$counter";
$digSum = 0;
for($i = 0; $i < strlen($counterStr); $i++) {
$digSum = $digSum + (int) $counterStr[$i];
}
if($digSum === 17 && $counterStr[strlen($counterStr) - 2] === "1" && $counterStr[strlen($counterStr) - 1] == "7" && $counter !== 917) {
var_dump($counter);
break;
}
}
}