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PHP strlen() Function

Last Updated : 11 Jul, 2025

The strlen() is a built-in function in PHP which returns the length of a given string.

It calculates the length of the string including all the whitespaces and special characters. 

Syntax:

strlen($string);

Parameters:

This parameter represents the string whose length is needed to be returned. 

Return Value:

The function returns the length of the $string including all the whitespaces and special characters. 

Example 1: The below example demonstrates the use of the strlen() function in PHP.

Output:

13

Example 2: This example demonstrates the use of the strlen() function where the string has special characters and escape sequences.

Output:

25

PHP is a server-side scripting language designed specifically for web development. You can learn PHP from the ground up by following this PHP Tutorial and PHP Examples.

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