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run code in 150+ php & hhvm versions
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<?php $name = "M14910_20130831_120000_3Q13_revenue.txt.gz"; $filenamelength = strlen($name); echo substr($name, 0, ($filenamelength - 3)); ?>
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
M14910_20130831_120000_3Q13_revenue.txt
Output for hhvm-3.10.0

Process exited with code 153.