3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(extract(['foo' => 'bar', 'foo-bar' => 'baz']), ${'foo'}, ${'foo-bar'});
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.13
Warning: Undefined variable $foo-bar in /in/cnMmo on line 3 int(1) string(3) "bar" NULL
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: foo-bar in /in/cnMmo on line 3 int(1) string(3) "bar" NULL
Output for 7.3.32 - 7.3.33
int(1) string(3) "bar" NULL
preferences:
162.84 ms | 408 KiB | 5 Q