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<?php /* final */class Animal { public static $version = 'ANI01'; public function move(int $steps): void { echo "$steps déplacements"; } public static function version(): string { // return static::$version; return self::$version; } } class Cat extends Animal { public static $version = 'CAT07'; public function move(int $steps): void { // parent::move($steps); echo "$steps pas"; } } $animal = new Animal(); $cat = new Cat(); $cat->move(2); echo PHP_EOL; echo Cat::version().PHP_EOL; var_dump($cat instanceof Animal); var_dump(Cat::class);
Output for 7.1.0 - 7.1.13, 7.1.16 - 7.1.33, 7.2.0 - 7.2.26, 7.3.0 - 7.3.13, 7.4.0 - 7.4.1, 8.1.26 - 8.1.28, 8.2.13 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
2 pas ANI01 bool(true) string(3) "Cat"
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 2 pas ANI01 bool(true) string(3) "Cat"
Output for 5.6.32 - 5.6.34, 7.0.15, 7.1.14 - 7.1.15

Process exited with code 137.
Output for 7.0.0 - 7.0.14, 7.0.16 - 7.0.33
2 pas Fatal error: Uncaught TypeError: Return value of Cat::move() must be an instance of void, none returned in /in/SAmgD:27 Stack trace: #0 /in/SAmgD(33): Cat->move(2) #1 {main} thrown in /in/SAmgD on line 27
Process exited with code 255.
Output for 5.6.0 - 5.6.31, 5.6.35 - 5.6.40
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/SAmgD on line 7
Process exited with code 255.
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127.83 ms | 401 KiB | 173 Q