How to use strlen function in php

strlen() function counts the number of characters in a string and returns the length of the string, including spaces and punctuation. It does not distinguish between single-byte and multi-byte characters. To calculate the length of a multibyte string, use the mb_strlen() function.

How to use the strlen function in PHP

Introduction
strlen() The function is used to calculate the length of a string and returns the number of characters in the string. It is a built-in function available in all versions of PHP.

Syntax

<code class="php">int strlen ( string $string )</code>

Parameters

• $string - The characters to calculate the length string.

Return value
Returns the length of the string, or 0 if the string is empty.

Usage

To use the strlen() function, follow these steps:

1. Specify the string as the first of the function parameter.
2. The function will return an integer representing the length of the string.

Example

<code class="php">$str = "Hello World";
$length = strlen($str);

echo $length; // 输出: 11</code>

Note

• strlen() function calculates the string Number of characters, including spaces and punctuation.
• If the string is empty, it will return 0.
• strlen() function does not distinguish between single-byte and multi-byte characters.
• To calculate the length of a multibyte string, use the mb_strlen() function.

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