<?php

class test {
}

$a = array(
    array(1,2,3),
    "",
    1,
    2.5,
    0,
    "string",
    "123",
    "2.5",
    NULL,
    true,
    false,
    new stdclass,
    new stdclass,
    new test,
    array(),
    -PHP_INT_MAX-1,
    (string)(-PHP_INT_MAX-1),
);

$var_cnt = count($a);

function my_dump($var) {
    ob_start();
    var_dump($var);
    $buf = ob_get_clean();
    echo str_replace("\n", "", $buf);
}

foreach($a as $var) {
    for ($i = 0; $i < $var_cnt; $i++) {
        my_dump($var);
        echo ($var == $a[$i]) ? " == " : " != ";
        my_dump($a[$i]);
        echo "\n";
    }
}

echo "Done\n";
?>