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@ 2014-08-27T11:35:08Z

<?php

$id = 1;
$_GET["id"] = -1;

if (isset($_GET["id"]))
	$id = (int) $_GET["id"];

var_dump($id);

Output
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var_dump: documentation ( source)

preferences:dark modelive preview

39.82 ms | 402 KiB | 5 Q