strripos

Description

int strripos ( string haystack, string needle [, int offset] )

Returns the numeric position of the last occurrence of needle in the haystack string. Unlike strrpos(), strripos() is case-insensitive. Also note that string positions start at 0, and not 1.

Note that the needle may be a string of one or more characters.

If needle is not found, FALSE is returned.

警示

本函數可能返回布林值 FALSE，但也可能返回一個與 FALSE 等值的非布林值，例如 0 或是 ""。請參閱布爾類型章節以取得更多訊息。應使用 === 運算符來測試本函數的返回值。

例子 1. A simple strripos() example
<?php $haystack = 'ababcd'; $needle = 'aB'; $pos = strripos($haystack, $needle); if ($pos === false) { echo "Sorry, we did not find ($needle) in ($haystack)"; } else { echo "Congratulations!\n"; echo "We found the last ($needle) in ($haystack) at position ($pos)"; } ?>
Outputs:
Congratulations! We found the last (aB) in (ababcd) at position (2)

The offset parameter may be specified to begin searching an arbitrary number of characters into the string.

Negative offset values will start the search at offset characters from the start of the string.