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<?php $a = array('a' => 1, 'ab' => 2, 'na' => null, 'nb' => 3); $a = array('b' => 10, 'ab' => 20, 'na' => 30, 'nb' => null); var_dump(array_merge($a, $b));
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $b in /in/fZh64 on line 5 Fatal error: Uncaught TypeError: array_merge(): Argument #2 must be of type array, null given in /in/fZh64:5 Stack trace: #0 /in/fZh64(5): array_merge(Array, NULL) #1 {main} thrown in /in/fZh64 on line 5
Process exited with code 255.

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