3v4l.org

run code in 300+ PHP versions simultaneously
;<?php $x = a['b']; var_dump($$x);
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
; Fatal error: Uncaught Error: Undefined constant "a" in /in/ago9R:2 Stack trace: #0 {main} thrown in /in/ago9R on line 2
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 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/ago9R on line 2 Warning: Illegal string offset 'b' in /in/ago9R on line 2 Notice: Undefined variable: a in /in/ago9R on line 3 NULL
Output for 7.3.32 - 7.3.33
; Warning: Use of undefined constant a - assumed 'a' (this will throw an Error in a future version of PHP) in /in/ago9R on line 2 Warning: Illegal string offset 'b' in /in/ago9R on line 2 NULL
Output for 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/ago9R on line 2 Warning: Illegal string offset 'b' in /in/ago9R on line 2 Notice: Undefined variable: a in /in/ago9R on line 3 NULL
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, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35
Parse error: syntax error, unexpected '[' in /in/ago9R 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/ago9R on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/ago9R on line 2
Process exited with code 255.

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