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run code in 300+ PHP versions simultaneously
<?php $myArr = []; // Is safe if (!empty($myArr['foo'])) { var_dump($myArr['foo']); } // Is not safe $myVal = $myArr['foo'];
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Undefined array key "foo" in /in/87i5g on line 11
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined index: foo in /in/87i5g on line 11
Output for 7.3.32 - 7.3.33

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