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@ 2021-11-04T14:24:03Z

<?php

error_reporting(E_ALL);

$not_array = false;

// Case #1, incorrect: only 'PHP Warning:  Undefined array key "nonexistant"' is logged
echo (array_key_exists($_REQUEST['nonexistant'], $not_array) ? "yes" : "no");

Output
Performance
VLD
References
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error_reporting: documentation ( source)

preferences:dark modelive previewkey bindings

32.72 ms | 405 KiB | 5 Q