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@ 2017-06-20T05:09:33Z

<?php

$falseArr = [
    '',
    '0',
    0,
    false,
    [],
    null
];


$trueArr = [
    ' ',
    'false',
    '123',
    'abc',
    1,
    true,
    ['val'],
    new stdClass,
    function(){}
];
$print = function ($arr) {
    foreach ($arr as $v) {
        var_dump($v==false);
    }
};

$print($falseArr);
echo "\n";
$print($trueArr);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

120.23 ms | 404 KiB | 5 Q