3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = 'f5'; print "$x\n"; for ($i=0; $i<20; $i++){ $x++; print "$x\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
f5 f6 f7 f8 f9 g0 g1 g2 g3 g4 g5 g6 g7 g8 g9 h0 h1 h2 h3 h4 h5

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