YouTipFunc String Mb_Strlen
# PHP mb_strlen() Function
[ PHP String Reference](#)
## Example
The function returns the length of the string "":
```php
The output is:
10
18
* * *
## Definition and Usage
The `mb_strlen()` function returns the length of a string. Unlike (#), it can return the corresponding character count by setting the character encoding, effectively handling the length issue of Chinese strings.
To use `mb_strlen`, the `mbstring` extension must be enabled.
* * *
## Syntax
```php
mb_strlen(string $string, ?string $encoding = null): int
`mb_strlen()` is used to get the length of a string.
| Parameter | Description |
| :--- | :--- |
| _string_ | Required. The string to be checked. |
| _encoding_ | Optional. The character encoding. If omitted, the internal character encoding is used. |
## Technical Details
| Return Value: | Returns the length of the string on success, or 0 if the string is empty. |
| :--- |
| PHP Version: | 4+ |
* * PHP String Reference](#)
[](#)(#)
(#)[](#)
### Share Notes