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run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump( substr('abc', 3) , substr('abc', 2) );
Output for 7.0.0 - 7.1.0
string(0) "" string(1) "c"
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0
bool(false) string(1) "c"