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run code in 200+ php & hhvm versions
Bugs & Features
<?php $arr = array(5 => 1, 12 => 2); $arr[] = 56; // This is the same as $arr[13] = 56; // at this point of the script $arr["x"] = 42; // This adds a new element to // the array with key "x" unset($arr[5]); // This removes the element from the array unset($arr); // Th var_dump($arr);
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: arr in /in/R8SF6 on line 15 NULL
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: arr in /in/R8SF6 on line 15 NULL