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# str_ireplace

(PHP 5)

str_ireplace -- Case-insensitive version of str_replace().

## Description

mixed str_ireplace ( mixed search, mixed replace, mixed subject [, int &count])

This function returns a string or an array with all occurrences of `search` in `subject` (ignoring case) replaced with the given `replace` value. If you don't need fancy replacing rules, you should generally use this function instead of eregi_replace() or preg_replace() with the `i` modifier.

If `subject` is an array, then the search and replace is performed with every entry of `subject`, and the return value is an array as well.

If `search` and `replace` are arrays, then str_ireplace() takes a value from each array and uses them to do search and replace on `subject`. If `replace` has fewer values than `search`, then an empty string is used for the rest of replacement values. If `search` is an array and `replace` is a string; then this replacement string is used for every value of `search`.

例 1. str_ireplace() example

`<?php $bodytag = str_ireplace("%body%", "black", "<body text=%BODY%>"); ?>`

This function is binary safe.

> 注意: As of `PHP 5.0.0` the number of matched and replaced `needles` will be returned in `count` which is passed by reference. Prior to `PHP 5.0.0` this parameter is not available.

See also: str_replace(), ereg_replace(), preg_replace(), and strtr().

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