Online PHP editor | refs for 4OBH1

@ 2014-02-04T17:20:06Z

<?php
$str = trim('-1');

echo $str . "\n";

if ($str) {
    echo "option 1: not empty\n";
}

if (strlen($str)) {
    echo "option 2: not empty\n";
}

if (!empty($str)) {
    echo "option 3: not empty\n";
}

if ($str !== '') {
    echo "option 4: not empty\n";
}