PHP str_ireplace() Function

❮ PHP String Reference

Example

Replace the characters "WORLD" (case-insensitive) in the string "Hello world!" with "Peter":

<?php
echo str_ireplace("WORLD","Peter","Hello world!");
?>

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Definition and Usage

The str_ireplace() function replaces some characters with some other characters in a string.

This function works by the following rules:

If the string to be searched is an array, it returns an array
If the string to be searched is an array, find and replace is performed with every array element
If both find and replace are arrays, and replace has fewer elements than find, an empty string will be used as replace
If find is an array and replace is a string, the replace string will be used for every find value

Note: This function is case-insensitive. Use the str_replace() function to perform a case-sensitive search.

Note: This function is binary-safe.

Syntax

str_ireplace(find,replace,string,count)

Parameter Values

Parameter	Description
find	Required. Specifies the value to find
replace	Required. Specifies the value to replace the value in find
string	Required. Specifies the string to be searched
count	Optional. A variable that counts the number of replacements

Technical Details

Return Value:	Returns a string or an array with the replaced values
PHP Version:	5+
Changelog:	The count parameter was added in PHP 5.0

More Examples

Example

Using str_ireplace() with an array and a count variable:

<?php
$arr = array("blue","red","green","yellow");
print_r(str_ireplace("RED","pink",$arr,$i)); // This function is case-insensitive
echo "Replacements: $i";
?>

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Example

Using str_ireplace() with fewer elements in replace than find:

<?php
$find = array("HELLO","WORLD");
$replace = array("B");
$arr = array("Hello","world","!");
print_r(str_ireplace($find,$replace,$arr));
?>

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❮ PHP String Reference