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<?php $a = []; $b = ["item_data"=>[a,b,c]]; $c = ["item_data"=>[d,e,f]]; $d = array_merge($b,$c); var_dump($d);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Undefined constant "a" in /in/Hb5qc:3 Stack trace: #0 {main} thrown in /in/Hb5qc on line 3
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant a - assumed 'a' (this will throw an Error in a future version of PHP) in /in/Hb5qc on line 3 Warning: Use of undefined constant b - assumed 'b' (this will throw an Error in a future version of PHP) in /in/Hb5qc on line 3 Warning: Use of undefined constant c - assumed 'c' (this will throw an Error in a future version of PHP) in /in/Hb5qc on line 3 Warning: Use of undefined constant d - assumed 'd' (this will throw an Error in a future version of PHP) in /in/Hb5qc on line 4 Warning: Use of undefined constant e - assumed 'e' (this will throw an Error in a future version of PHP) in /in/Hb5qc on line 4 Warning: Use of undefined constant f - assumed 'f' (this will throw an Error in a future version of PHP) in /in/Hb5qc on line 4 array(1) { ["item_data"]=> array(3) { [0]=> string(1) "d" [1]=> string(1) "e" [2]=> string(1) "f" } }
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
Notice: Use of undefined constant a - assumed 'a' in /in/Hb5qc on line 3 Notice: Use of undefined constant b - assumed 'b' in /in/Hb5qc on line 3 Notice: Use of undefined constant c - assumed 'c' in /in/Hb5qc on line 3 Notice: Use of undefined constant d - assumed 'd' in /in/Hb5qc on line 4 Notice: Use of undefined constant e - assumed 'e' in /in/Hb5qc on line 4 Notice: Use of undefined constant f - assumed 'f' in /in/Hb5qc on line 4 array(1) { ["item_data"]=> array(3) { [0]=> string(1) "d" [1]=> string(1) "e" [2]=> string(1) "f" } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/Hb5qc on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/Hb5qc on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/Hb5qc on line 2
Process exited with code 255.
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