3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo() { yield 'a' => 1; yield 'b' => 2; yield 'c' => 3; } $it = foo(); do { echo key($it), "\n", current($it), "\n"; } while($it->next());

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56.91 ms | 402 KiB | 5 Q