3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo($flag = false): \Generator { if ($flag) { return null; } yield from [1, 2]; } function bar($flag = false): \Generator { if ($flag) { return null; } return internal(); } function internal(): \Generator { yield from [1, 2]; } foreach (foo() as $v){} foreach (foo(true) as $v){} foreach (bar() as $v){} foreach (bar(true) as $v){}
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 - 8.3.7
Fatal error: Uncaught TypeError: bar(): Return value must be of type Generator, null returned in /in/EpIjA:15 Stack trace: #0 /in/EpIjA(29): bar(true) #1 {main} thrown in /in/EpIjA on line 15
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: bar(): Return value must be of type Generator, null returned in /in/EpIjA:15 Stack trace: #0 /in/EpIjA(29): bar(true) #1 {main} thrown in /in/EpIjA on line 15
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: Return value of bar() must be an instance of Generator, null returned in /in/EpIjA:15 Stack trace: #0 /in/EpIjA(29): bar(true) #1 {main} thrown in /in/EpIjA on line 15
Process exited with code 255.
preferences:
153.92 ms | 402 KiB | 157 Q