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run code in 200+ php & hhvm versions
Bugs & Features
<?php $_POST = ['foo' => 'bar', 'foobar' => 123]; $validKeys = ['foo']; foreach ($validKeys as $key) { if (!isset($_POST['$key']) || !$_POST['$key']) { echo "$key: $val"; } // do stuff with $_POST[$key] }
based on pTb2A
Output for 5.4.0 - 5.6.30, hhvm-3.10.1 - 3.17.3, 7.0.0 - 7.2.0
Notice: Undefined variable: val in /in/NYRbi on line 9 foo: