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@ 2015-12-04T04:50:05Z

<?php
declare(strict_types=1);

function sum(int $a, int $b) {
    return $a + $b;
}

var_dump(sum(1, 2));
var_dump(sum("1", "5"));
?>

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

42.28 ms | 402 KiB | 5 Q