Online PHP editor | refs for ObLpV

<?php class NotAnInt { function __toString() { return " 1"; } } // the filter_* functions trim whitespace which can result in data loss var_dump(filter_var(" 1 ", FILTER_VALIDATE_INT)); // because filter_var casts passed values to a string, it accepts various unsafe values var_dump(filter_var(true, FILTER_VALIDATE_INT)); var_dump(filter_var(1.00000000000001, FILTER_VALIDATE_INT)); var_dump(filter_var(new NotAnInt(), FILTER_VALIDATE_INT));