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run code in 200+ php & hhvm versions
Bugs & Features
<?php $value='13'; var_dump(ctype_digit($value)); $value=13; var_dump(ctype_digit($value));
based on XpUUE
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0rc6
bool(true) bool(false)