How to convert a string to an integer in PHP

In this tutorial, we are going to see how to convert a string to an integer in PHP. As we know, PHP does not support explicit type definition in variable declaration. However, you can force a variable to be evaluated as a certain type using Type-Casting.

Let’s try the following example to understand how this works:
 

How to convert a string to an integer in PHP

<?php
	$nbr = "5.21";
	
	// Cast to a float
	$float = (float)$nbr;
	echo $float;
	
	// Cast to an integer 
	$int = (int)$nbr;
	echo $int;
?>

Output:

5.21
5

You can use (int) or (integer) to convert a variable to an integer, use (float) or (double) to convert a variable to float. In the same way, you can use (string) to convert a variable to a string, and so on.
 

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