PHP：is_int返回错误的结果

Question

I am posting numeric value by a form and in php file use var_dump(is_int($my_var)); but it return bool(false) though i am posting 1 and if I use var_dump(is_int(1)); it is fine and return bool(true) what is wrong....?

Answer 1

Variables transmitted by a POST request are strings, so you're calling is_int() on a string which returns false.

You may use is_numeric() or filter_var() instead or simply cast your variable to an integer.