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<?php class C { public ?int $v = 123; } $x = new C; unset($x->v); $y = new C; $y->v = null; print @array_key_exists('v', $x); print @array_key_exists('v', $y);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, C given in /in/rH4p4:7 Stack trace: #0 {main} thrown in /in/rH4p4 on line 7
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: array_key_exists(): Argument #2 ($array) must be of type array, C given in /in/rH4p4:7 Stack trace: #0 {main} thrown in /in/rH4p4 on line 7
Process exited with code 255.
Output for 7.4.0 - 7.4.33
1
Output for 7.3.0 - 7.3.33
Parse error: syntax error, unexpected '?', expecting function (T_FUNCTION) or const (T_CONST) in /in/rH4p4 on line 3
Process exited with code 255.

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