The intval() function in PHP

Photo from Unsplash

The PHP intval() function is used to get the integer value of a data.

The syntax of the function is as follows:

    mixed $value, 
    int $base = 10
): int

The function accepts two parameters:

  • The $value to convert to int type (required)
  • The $base number system for the conversion (optional)

This function converts the $value to int type and return it. How the function extracts the converts that value is up to the PHP engine.

For a string of numbers, the integer representing the number will be returned.

If you pass a string of characters, it will return 0.

Here are some examples of running the function on different data types:

intval("101"); // returns int -> 101
intval("Jack"); // returns int -> 0

intval("4 weeks"); // 4
intval("week 4"); // 0

intval(3.14231); // returns int -> 3
intval(NULL); // returns int -> 0

intval(true); // returns int -> 1
intval(false); // returns int -> 0

The intval() function one of the ways you can convert a string to number.

For other methods, you can see the PHP convert string to number guide.

Now you’ve learned how the intval() function works in PHP. Nice! 👍

Take your skills to the next level ⚡️

I'm sending out an occasional email with the latest tutorials on programming, web development, and statistics. Drop your email in the box below and I'll send new stuff straight into your inbox!

No spam. Unsubscribe anytime.