Function of strlen function in php

strlen function returns the length of the string (number of bytes). The specific usage is as follows: strlen($string): Calculate the length of $string. For multibyte character sets, a character may consist of multiple bytes. If $string is the empty string, strlen returns 0. If $string is not a string, strlen will raise a TypeError exception.

strlen function

Function:
strlen function returns the length of the string (number of bytes).

Usage:

strlen($string);

Among them, $string is the string whose length is to be calculated.

Example:

$string = "Hello World";
$length = strlen($string); // 11

Note:

• strlen function returns the number of bytes, not the number of characters . For multibyte character sets (such as UTF-8), a character may consist of multiple bytes.
• If $string is an empty string, the strlen function returns 0.
• If $string is not a string, the strlen function triggers a TypeError exception.

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