PHP strrchr() Function: Description, Parameters, Return Value, and Usage Examples

Function Overview The string strrchr ( string $haystack , mixed $needle ) function searches for the last occurrence of a specified character (or the first character of a string) within the $haystack string and returns the portion of the string from that point to the end.

Explanation The function returns a substring of $haystack starting at the last occurrence of $needle. If $needle is not found, the function returns FALSE. When $needle contains more than one character, only its first character is considered, differing from strstr(). If $needle is not a string, it is converted to an integer and treated as an ASCII value.

Parameters

haystack : The string to be searched.

needle : The character or string to locate. If it is a string longer than one character, only the first character is used; non‑string values are cast to integers.

Return Value A substring of $haystack beginning with the last occurrence of $needle. If $needle is not found, FALSE is returned.

Example 1

<?php
$PATH = 'NAME:PASSWD:CHECK';
$dir = substr(strrchr($PATH, ':'), 1);
echo $dir; // 输出 CHECK

// 获取最后一行内容
$text = "Line 1
Line 2
Line 3";
$last = substr(strrchr($text, 10), 1);
echo $last; // 输出 line 3
?>

Example 2

<?php
echo strrchr("I love Shanghai!", "Shanghai"); // 输出 Shanghai！
?>

Example 3

<?php
echo strrchr("Hello world! What a beautiful day!", What); // 输出 What a beautiful day!
?>