HTML tutorial
CSS3 tutorial
Bootstrap tutorial
JavaScript tutorial
JQuery tutorial
AngularJS tutorial
React tutorial
NodeJS tutorial
PHP tutorial
Python tutorial
Python3 tutorial
Django tutorial
Linux tutorial
Docker tutorial
Ruby tutorial
Java tutorial
C tutorial
C ++ tutorial
Perl tutorial
JSP tutorial
Lua tutorial
Scala tutorial
Go tutorial
ASP.NET tutorial
C # tutorial
PHP String Reference : Replace "Hello" with "world"
The substr_replace() function replaces a part of a string with another string.
Parameter | Description |
---|---|
string | Required. Specifies the string to check |
replacement | Required. Specifies the string to insert |
start | Required. Specifies where to start replacing in the string
|
length | Optional. Specifies how many characters should be replaced. Default is the same length as the string.
|
Return Value: | Returns the replaced string. If the string is an array then the array is returned |
---|---|
PHP Version: | 4+ |
Changelog: | As of PHP 4.3.3, all parameters now accept arrays |
Start replacing at the 6th position in the string (replace "world" with "earth"):
<?php
echo substr_replace("Hello world","earth",6);
?>
Start replacing at the 5th position from the end of the string (replace "world" with "earth"):
<?php
echo substr_replace("Hello world","earth",-5);
?>
Insert "Hello" at the beginning of "world":
<?php
echo substr_replace("world","Hello ",0,0);
?>
Replace multiple strings at once. Replace "AAA" in each string with "BBB":
<?php
$replace = array("1: AAA","2: AAA","3: AAA");
echo implode("<br>",substr_replace($replace,'BBB',3,3));
?>
❮ PHP String Reference