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<?php echo (string)array_shift($a=[array_sum([substr("4", 1)])]);
Output for 8.3.0 - 8.3.4, 8.3.6
Warning: array_sum(): Addition is not supported on type string in /in/V0UgE on line 3 Fatal error: Uncaught Error: array_shift(): Argument #1 ($array) could not be passed by reference in /in/V0UgE:3 Stack trace: #0 {main} thrown in /in/V0UgE on line 3
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 Warning: array_sum(): Addition is not supported on type string in /in/V0UgE on line 3 Fatal error: Uncaught Error: array_shift(): Argument #1 ($array) could not be passed by reference in /in/V0UgE:3 Stack trace: #0 {main} thrown in /in/V0UgE on line 3
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Fatal error: Uncaught Error: array_shift(): Argument #1 ($array) cannot be passed by reference in /in/V0UgE:3 Stack trace: #0 {main} thrown in /in/V0UgE on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Only variables should be passed by reference in /in/V0UgE on line 3 0
Output for 7.3.32 - 7.3.33
0
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
Strict Standards: Only variables should be passed by reference in /in/V0UgE on line 3 0

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