3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = "123"; $y = "456A"; $z = "78"; echo $x < $y ? "x < y" : "x > y"; echo $y < $z ? "y < z" : "y > z"; echo $z < $x ? "z < x" : "z > x";
Output for git.master, git.master_jit, rfc.property-hooks
x < yy < zz < x

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