is_nan

PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8
is_nan - Finds whether a value is not a number
Is Nan Online Tool
Manual
Code Examples

Example #1 is_nan example

Result: float(NAN) bool(true)
Edit/Test in Sandbox
PHP Version:


Example #2 of is_nan

Edit/Test in Sandbox
PHP Version:


Function is_nan:

Mathematical Functions Functions

Most used PHP functions