Hey everyone,

I am relatively new to PHP and I'm currently working on a project that involves dealing with numbers and calculations. While going through the PHP documentation, I came across the is_finite() function, but I'm not quite sure how it works.

Could someone kindly explain to me what the is_finite() function does in PHP and perhaps provide an example to help me understand its usage? I would really appreciate it.

Thanks in advance!

Hey there!

Sure, I'd be happy to help you understand the is_finite() function in PHP.

The is_finite() function is a handy function that allows you to check if a given numeric value is finite or not. A finite number is simply any number that is not infinite or not NaN (Not a Number).

To put it simply, is_finite() returns true if the value passed to it is a finite number, and false if it's not. This function can be quite useful when you're dealing with complex calculations or need to validate user inputs.

Here's a quick example to illustrate its usage:

In this example, is_finite() is called on three different variables: $number1, $number2, and $number3. The var_dump() function is used to display the results. As you can see, $number1 is a finite number, so is_finite() returns true for it. On the other hand, $number2 and $number3 are not finite, so is_finite() returns false for them.

I hope this explanation helps! Feel free to ask if you have any further questions.