06. Special Combinations PHP

<?php
$m = intval(readline());
$n = intval(readline());
$l = intval(readline());
//$special = intval(readline());
//$control = intval(readline());

for($i = 1;  $i <= $m;  $i++) {
    for ($j = 2; $j <= $n; $j++) {
        for ($k = 1; $k <= $l; $k++) {

            // $combine = $i * 100 + $j * 10 + $k;
            // echo $combine."\n";
            $prime = null;
            if($j == 2){
                $prime = true;
            }elseif ($j == 3){
                $prime = true;
            }elseif($j == 4 ){
                $prime = false;
            }
            elseif ($j == 5){
                $prime = true;
            }elseif ($j == 7){
                $prime = true;
            }


            if ($i % 2 == 0 && $prime==true  && $k % 2 == 0) {
                echo $i ." ". $j." ". $k . "\n";
            }

        }
    }
}