3v4l.org

run code in 500+ PHP versions simultaneously
<?php function foo() { while (true) { yield mt_rand(1, 2) => 'foo'; } } $foo = foo(); $foo->next(); echo $foo->key(), ' => ', $foo->current(), PHP_EOL; $foo->next(); echo $foo->key(), ' => ', $foo->current(), PHP_EOL; $foo->next(); echo $foo->key(), ' => ', $foo->current(), PHP_EOL; $foo->next(); echo $foo->key(), ' => ', $foo->current(), PHP_EOL;
Output for 7.2.0, 7.1.5
1 => foo 2 => foo 2 => foo 2 => foo
Output for 7.1.7, 7.0.20, 7.0.3, 5.6.28, 5.6.11, 5.6.7 - 5.6.8
2 => foo 1 => foo 2 => foo 1 => foo
Output for 7.1.6, 5.5.30
1 => foo 1 => foo 2 => foo 2 => foo
Output for 7.1.0, 5.5.34
2 => foo 1 => foo 1 => foo 2 => foo
Output for 7.0.6, 7.0.1
1 => foo 2 => foo 1 => foo 1 => foo
Output for 7.0.5, 7.0.0, 5.6.13, 5.5.33, 5.5.26
2 => foo 2 => foo 2 => foo 1 => foo
Output for 7.0.4, 7.0.2
2 => foo 1 => foo 1 => foo 1 => foo
Output for 5.6.21, 5.6.17
2 => foo 2 => foo 1 => foo 2 => foo
Output for 5.6.20, 5.5.24
2 => foo 1 => foo 2 => foo 2 => foo
Output for 5.6.19, 5.6.10, 5.5.35
1 => foo 1 => foo 2 => foo 1 => foo
Output for 5.6.18, 5.6.14, 5.5.31, 5.5.27
1 => foo 2 => foo 1 => foo 2 => foo
Output for 5.6.16, 5.5.29
1 => foo 2 => foo 2 => foo 1 => foo
Output for 5.6.15, 5.6.12, 5.6.9, 5.5.28
2 => foo 2 => foo 1 => foo 1 => foo
Output for 5.5.32
2 => foo 2 => foo 2 => foo 2 => foo
Output for 5.5.25
1 => foo 1 => foo 1 => foo 1 => foo
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected 'mt_rand' (T_STRING) in /in/275iF on line 5
Process exited with code 255.
preferences:
63.12 ms | 1636 KiB | 49 Q