PHP strrchr() Function: Syntax, Usage, Examples, and Case Sensitivity

Syntax of strrchr()

The strrchr() function is a PHP string function used to find the last occurrence of a specified character in a string and return that position together with all characters that follow it.

strrchr(string $haystack, mixed $needle): string|false

In this signature, $haystack is the string to be searched, and $needle is the character or substring to look for.

Usage of strrchr()

Return Value

The function returns a string containing the portion of $haystack from the found character or substring to the end of the string. If the character or substring is not found, it returns false.

Example

Below is an example demonstrating how to use strrchr():

$str = "Hello, World!";
$lastComma = strrchr($str, ",");
echo $lastComma; // outputs: , World!

In this example, $str is the original string, $lastComma holds the result of strrchr(), which finds the last comma and the text after it, and echo prints , World!.

Searching for a Character or Substring

The strrchr() function can search for a single character or a multi‑character substring. The following code shows two scenarios:

$str = "Hello, World!";
$lastComma = strrchr($str, ",");
echo $lastComma; // outputs: , World!

$str = "Hello, World!";
$lastWord = strrchr($str, "World");
echo $lastWord; // outputs: World!

In the first case the function searches for a comma, while in the second it searches for the substring "World". Whether searching for a character or a substring, strrchr() returns the found text together with everything that follows it.

Case Sensitivity

By default strrchr() is case‑sensitive, meaning a mismatch in case will cause the function to return false. For a case‑insensitive search you can use strripos() instead.

Summary

The strrchr() function is used to locate the last occurrence of a character or substring within a string and returns the portion of the string from that point to the end. It operates in a case‑sensitive manner unless you switch to a case‑insensitive alternative such as strripos().

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