Online PHP editor | refs for 1QPu6

@ 2013-06-25T19:17:20Z

<?php
$_POST = ['checkbox_1' => 1, 'checkbox_4' => 8, 'checkbox_8' => 1];
$result = '';
for($i = 1; $i <= 10; $i++)
{
    if(isset($_POST['checkbox_' . $i]))
        $result .= ' ' . $i;
}
echo trim($result);