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# strripos

(PHP 5)

strripos -- Find position of last occurrence of a case-insensitive string in a string

## 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.

警告
這個函數可能回傳布林值 `FALSE`，但也可能回傳一個同於 `FALSE` 的非布林值，像是0或 ""請參考Booleans此節有更多資訊。使用 === 運算子來測試這個函數的回傳值。

範例 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)

offset may be specified to begin searching an arbitrary number of characters into the string. Negative values will stop searching at an arbitrary point prior to the end of the string.

See also strrpos(), strrchr(), substr(), stripos() and stristr().

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