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run code in 300+ PHP versions simultaneously
<?php $a = 'a'; $foo = 'woot'; $$a = 'foo'; $$$a = 'bar'; echo $a . "\n"; echo $foo . "\n"; echo $$a . "\n"; echo $woot . "\n";
Output for git.master, git.master_jit, rfc.property-hooks
foo woot woot bar

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