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<?php $b = 10; $f = function() use ($b) { return $x = function($b) { return $b; }; }; var_dump( $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 - 8.3.7
Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 0 passed in /in/QTMKf on line 7 and exactly 1 expected in /in/QTMKf:4 Stack trace: #0 /in/QTMKf(7): {closure}() #1 {main} thrown in /in/QTMKf on line 4
Process exited with code 255.
Output for 7.0.0 - 7.0.32
Warning: Missing argument 1 for {closure}(), called in /in/QTMKf on line 7 and defined in /in/QTMKf on line 4 Notice: Undefined variable: b in /in/QTMKf on line 4 NULL
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Parse error: syntax error, unexpected '(' in /in/QTMKf on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/QTMKf on line 3
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 T_FUNCTION in /in/QTMKf on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/QTMKf on line 3
Process exited with code 255.

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