3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace Foo; class Bar { public static function testClass(): \Closure { return function(){}; } } function testFunc(): \Closure { return function(){}; } var_dump((new \ReflectionFunction(Bar::testClass()))->getNamespaceName()); var_dump((new \ReflectionFunction(testFunc()))->getNamespaceName());
Output for 8.4.1 - 8.4.14, 8.5.0
string(0) "" string(0) ""
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28
string(3) "Foo" string(3) "Foo"

preferences:
46.21 ms | 409 KiB | 5 Q