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run code in 150+ php & hhvm versions
Bugs & Features
<?php echo `/usr/bin/php echo 1;`;
Output for 4.3.0, 5.4.41 - 5.6.28, 7.0.0 - 7.1.0
Output for hhvm-3.12.0
Failed to exec: `/usr/bin/php echo 1;'
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.1 - 5.4.40
sh: 1: /usr/bin/php: not found