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<?php $table = ['foo' => function($foo) { var_dump($foo); }, 'boo' => function($foo) { var_dump($foo); }]; $table['foo'](10)(12);
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
int(10) Fatal error: Uncaught Error: Value of type null is not callable in /in/6j6Cb:4 Stack trace: #0 {main} thrown in /in/6j6Cb on line 4
Process exited with code 255.
Output for 7.0.1 - 7.0.9, 7.0.11, 7.0.13, 7.0.16 - 7.0.33, 7.1.1, 7.1.3 - 7.1.16, 7.1.21 - 7.1.29, 7.1.31 - 7.1.33, 7.2.0 - 7.2.4, 7.2.6, 7.2.8, 7.2.10 - 7.2.18, 7.2.20 - 7.2.33, 7.3.0 - 7.3.6, 7.3.8, 7.3.10 - 7.3.33, 7.4.0 - 7.4.33
int(10) Fatal error: Uncaught Error: Function name must be a string in /in/6j6Cb:4 Stack trace: #0 {main} thrown in /in/6j6Cb on line 4
Process exited with code 255.
Output for 5.5.30, 5.6.1, 5.6.12, 5.6.15, 5.6.20, 5.6.32 - 5.6.33, 5.6.36, 7.0.0, 7.0.10, 7.0.12, 7.0.14 - 7.0.15, 7.1.0, 7.1.2, 7.1.17 - 7.1.20, 7.1.30, 7.2.5, 7.2.7, 7.2.9, 7.2.19, 7.3.7, 7.3.9

Process exited with code 137.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.29, 5.5.31 - 5.5.38, 5.6.0, 5.6.2 - 5.6.11, 5.6.13 - 5.6.14, 5.6.16 - 5.6.19, 5.6.21 - 5.6.31, 5.6.34 - 5.6.35, 5.6.37 - 5.6.40
Parse error: syntax error, unexpected '(' in /in/6j6Cb on line 4
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, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/6j6Cb 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 '[' in /in/6j6Cb on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/6j6Cb on line 3
Process exited with code 255.

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