Strrpos()

Introduction

The strrpos() function in PHP is used to find the last occurrence of a substring in a string. It searches for the substring from the end of the string and returns the position of the last occurrence of the substring. In this article, we will discuss the strrpos() function in detail and how it can be used in PHP.

Understanding the strrpos() function

The syntax for using the strrpos() function in PHP is as follows:

strrpos(string $haystack, string $needle, int $offset = 0) : int|false

Here, $haystack is the string in which we want to search for the $needle substring. The $needle parameter is the substring that we want to search for. The $offset parameter is an optional parameter that specifies the starting position for the search.

The strrpos() function searches the $haystack string for the last occurrence of the $needle substring. If the $needle substring is found, the function returns the position of the last occurrence of the $needle substring. If the $needle substring is not found, the function returns false.

Example Usage

Here is an example usage of the strrpos() function in PHP:

<?php

$string = "Hello World";
$search = "o";

$result = strrpos($string, $search);

if ($result !== false) {
  echo "Found last occurrence of '$search' in '$string' at position $result";
} else {
  echo "Did not find '$search' in '$string'";
}

In the example above, we define a string $string and a search substring $search. We then use the strrpos() function to find the last occurrence of the $search substring in the $string. Since the $search substring is found in the $string at the last position, the output will be "Found last occurrence of 'o' in 'Hello World' at position 7".

Conclusion

The strrpos() function in PHP is a useful tool for finding the last occurrence of a substring in a string. It can be used in situations where specific substrings need to be located at the end of a string. By understanding how to use the strrpos() function, developers can create more efficient and effective PHP applications.