3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = ['foo' => 213]; array_map(function($x ,$y) { var_dump($x, $y); }, $a);
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 1 passed and exactly 2 expected in /in/QQiS7:5 Stack trace: #0 [internal function]: {closure}(213) #1 /in/QQiS7(5): array_map(Object(Closure), Array) #2 {main} thrown in /in/QQiS7 on line 5
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 1 passed and exactly 2 expected in /in/QQiS7:5 Stack trace: #0 [internal function]: {closure}(213) #1 /in/QQiS7(7): array_map(Object(Closure), Array) #2 {main} thrown in /in/QQiS7 on line 5
Process exited with code 255.
Output for 5.4.1 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
Warning: Missing argument 2 for {closure}() in /in/QQiS7 on line 5 Notice: Undefined variable: y in /in/QQiS7 on line 6 int(213) NULL

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