3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = "foo boo foo boo"; echo "$a\n"; $b = strtr($a, array("foo"=>"boo", "boo"=>"foo")); echo "$b\n";
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 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 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.14, 8.4.1
foo boo foo boo boo foo boo foo
preferences:
49.55 ms | 408 KiB | 5 Q