3v4l.org

run code in 300+ PHP versions simultaneously
<?php $f = function($fun, $x) { return $fun($x*$x); }; $f($f,1);
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, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 1 passed in /in/sLW8o on line 3 and exactly 2 expected in /in/sLW8o:3 Stack trace: #0 /in/sLW8o(3): {closure}(1) #1 /in/sLW8o(4): {closure}(Object(Closure), 1) #2 {main} thrown in /in/sLW8o on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.33
Warning: Missing argument 2 for {closure}(), called in /in/sLW8o on line 3 and defined in /in/sLW8o on line 3 Fatal error: Uncaught Error: Function name must be a string in /in/sLW8o:3 Stack trace: #0 /in/sLW8o(3): {closure}(1) #1 /in/sLW8o(4): {closure}(Object(Closure), 1) #2 {main} thrown in /in/sLW8o on line 3
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Warning: Missing argument 2 for {closure}(), called in /in/sLW8o on line 3 and defined in /in/sLW8o on line 3 Fatal error: Function name must be a string in /in/sLW8o on line 3
Process exited with code 255.

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