Tác dụng của hàm strlen()
The strlen() function returns the length of a string.
The following table summarizes the technical details of this function.
| Return Value: | Returns the length of the string on success, and 0 if the string is empty. |
|---|---|
| Version: | PHP 4+ |
Syntax
The basic syntax of the strlen() function is given with:
strlen(string);
The following example shows the strlen() function in action.
Example
Run this code »<?php
// Sample string
$str = "Hello World!";
// Getting the string length
echo strlen($str);
?>Parameters
The strlen() function accepts the following parameters.
| Parameter | Description |
|---|---|
| string | Required. Specifies the string to check for length. |