mbsubstr php

The mb_substr() function in PHP is used to extract a substring from a given string. It is similar to the substr() function, but it supports multi-byte encoding.

The basic syntax of mb_substr() is as follows:

mb_substr(string $str, int $start [, int $length [, string $encoding = mb_internal_encoding() ]]): string|false

• $str is the input string from which the substring will be extracted.
• $start is the starting position of the substring. If it is positive, the counting starts from the beginning of the string. If it is negative, the counting starts from the end of the string.
• $length (optional) specifies the length of the substring to be extracted. If not provided, it will extract all characters from the starting position to the end of the string.
• $encoding (optional) specifies the character encoding. If not provided, it uses the internal encoding set by mb_internal_encoding().

The function returns the extracted substring as a string, or false if an error occurs.

Example usage:

$str = "Hello, World!";
$substr = mb_substr($str, 7, 5); // Extracts "World"
echo $substr;

In this example, the mb_substr() function is used to extract the substring "World" starting from position 7 in the string "Hello, World!".