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run code in 300+ PHP versions simultaneously
<?php echo 2 | 3 | 4, "\n\n"; echo '2: 0', decbin(2), "\n"; echo '3: 0', decbin(3), "\n"; echo '4: ', decbin(4), "\n"; echo '7: ', decbin(7), "\n";
Output for git.master, git.master_jit, rfc.property-hooks
7 2: 010 3: 011 4: 100 7: 111

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