3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo(bool $b) { return $b; } var_dump(foo('false')); var_dump('foo' == (bool) 'foo');
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
bool(true) bool(true)
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Catchable fatal error: Argument 1 passed to foo() must be an instance of bool, string given, called in /in/SHPUu on line 7 and defined in /in/SHPUu on line 3
Process exited with code 255.
preferences:
175.6 ms | 402 KiB | 293 Q