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run code in 150+ php & hhvm versions
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<?php  $my_str = 'The quick brown fox jumps over the lazy dog';  echo str_replace("fox", "lion", $my_str);  ?>
based on fTD61
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.0 - 5.4.32
<?php  $my_str = 'The quick brown fox jumps over the lazy dog';  echo str_replace("fox", "lion", $my_str);  ?>