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run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(strlen(null)); var_dump(strlen(0)); var_dump(strlen(1234)); var_dump(strlen("")); var_dump(strlen("0"));
based on GPVFb
Output for 4.3.0 - 5.6.21, hhvm-3.12.0, 7.0.0 - 7.1.0
int(0) int(1) int(4) int(0) int(1)
Output for hhvm-3.10.0

Process exited with code 153.