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<?php $a = ['','',5,0,'hey']; print_r( array_filter($a), function($i) { return $i != 0; } );
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Fatal error: Uncaught TypeError: print_r(): Argument #2 ($return) must be of type bool, Closure given in /in/vmPpa:5 Stack trace: #0 /in/vmPpa(5): print_r(Array, Object(Closure)) #1 {main} thrown in /in/vmPpa on line 5
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Fatal error: Uncaught TypeError: print_r(): Argument #2 ($return) must be of type bool, Closure given in /in/vmPpa:5 Stack trace: #0 /in/vmPpa(5): print_r(Array, Object(Closure)) #1 {main} thrown in /in/vmPpa on line 5
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: print_r() expects parameter 2 to be bool, object given in /in/vmPpa on line 5
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33
Warning: print_r() expects parameter 2 to be boolean, object given in /in/vmPpa on line 5

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