PHP str_ireplace() Function

In this chapter you will learn:

Definition for PHP str_ireplace() Function
Syntax for PHP str_ireplace() Function
Parameter for PHP str_ireplace() Function
Return for PHP str_ireplace() Function
Example - Replace the characters "WORLD" (case-insensitive) in the string "Hello world from java2s.com!" with "PHP"
Example - Using str_replace() with an array and a count variable
Example - Using str_replace() with less elements in replace than find

Definition

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

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

Syntax

PHP str_ireplace() Function has the following syntax.

str_ireplace(find,replace,string,count)

Parameter

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

If search and replace are arrays, then str_ireplace() takes a value from each array and uses them to search and replace on subject.

If replace has fewer values than search, then an empty string is used for the rest of replacement values.

Return

Returns a string or an array with the replaced values

Example

Replace the characters "WORLD" (case-insensitive) in the string "Hello world from java2s.com!" with "PHP":


<?php
echo str_ireplace("WORLD","PHP","Hello world from java2s.com!");
?>

The code above generates the following result.

Example 2

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


<?php//from   j a  va 2 s . c  o  m
$arr = array("blue","red","green","yellow");
print_r(str_ireplace("RED","pink",$arr,$i)); // This function is case-insensitive
echo "Replacements: $i";
?>

The code above generates the following result.

Example 3

Using str_replace() with less elements in replace than find:


<?php//j a v a  2  s  . c o m
$find = array("HELLO","WORLD"); // This function is case-insensitive
$replace = array("B");
$arr = array("Hello","world","!");
print_r(str_ireplace($find,$replace,$arr));
?>