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<?php class Foo { public static function bar() { echo "hello"; } } $cb = array('Foo::bar'); $cb();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Fatal error: Uncaught Error: Array callback must have exactly two elements in /in/KdRNP:12 Stack trace: #0 {main} thrown in /in/KdRNP on line 12
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught Error: Function name must be a string in /in/KdRNP:12 Stack trace: #0 {main} thrown in /in/KdRNP on line 12
Process exited with code 255.
Output for 5.4.8 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Fatal error: Function name must be a string in /in/KdRNP on line 12
Process exited with code 255.

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