What are the uses of mb_substr in PHP?

The mb_substr function is used to retrieve a substring of a string, with the ‘mb’ standing for multi-byte character set. Its purposes include:

1. Obtain a substring starting from a specified position: you can specify both the starting position and the length to extract a portion of the original string, which is helpful for manipulating specific parts of the string.

Extracting a portion of a string: specifying a start and end position to extract a substring from the original string, used to extract a portion of content from the string.

3. Obtain a substring of a specified length starting from a given position: By specifying the starting position and length, you can retrieve a substring of a certain length from the original string, useful for handling a portion of the string’s content.

4. Obtain a substring of specified length from a string: It is possible to specify a length and retrieve a substring of that length from the original string, which is useful for manipulating a portion of the string content.

Get the last few characters of a string: You can specify the length from the end of the string to retrieve a substring containing the last few characters, used for managing the tail end of the string.

In short, the mb_substr function is used for handling substring operations on strings, allowing you to extract different parts of a string based on your specific needs.