PHP Basic
PHP HOME PHP Intro PHP Install PHP Syntax PHP Variables PHP String PHP Operators PHP If...Else PHP Switch PHP Arrays PHP Sorting Arrays PHP While Loops PHP For Loops PHP Functions PHP Forms PHP $_GET PHP $_POSTPHP Advanced
PHP Arrays Multi PHP Date PHP Include PHP File PHP File Upload PHP Cookies PHP Sessions PHP E-mail PHP Secure E-mail PHP Error PHP Exception PHP FilterPHP Database
PHP MySQL Intro PHP MySQL Connect PHP CREATE DB/Table PHP INSERT INTO PHP SELECT PHP WHERE PHP ORDER BY PHP UPDATE PHP DELETE PHP ODBCPHP XML
XML Expat Parser XML DOM XML SimpleXMLPHP and AJAX
AJAX Intro AJAX PHP AJAX Database AJAX XML AJAX Live Search AJAX RSS Reader AJAX PollPHP Reference
PHP Array PHP Calendar PHP Date PHP Directory PHP Error PHP Filesystem PHP Filter PHP FTP PHP HTTP PHP Libxml PHP Mail PHP Math PHP Misc PHP MySQLi PHP SimpleXML PHP String PHP XML PHP Zip PHP TimezonesPHP Quiz
PHP Quiz PHP CertificatePHP substr_replace() Function
Example
Replace "Hello" with "world":
<?php
echo substr_replace("Hello","world",0);
?>
echo substr_replace("Hello","world",0);
?>
Run example »
Definition and Usage
The substr_replace() function replaces a part of a string with another string.
Note: If the start parameter is a negative number and length is less than or equal to start, length becomes 0.
Note: This function is binary-safe.
Syntax
substr_replace(string,replacement,start,length)
| 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.
|
Technical Details
| 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 |
More Examples
Example 1
Start replacing at the 6th position in the string (replace "world" with "earth"):
<?php
echo substr_replace("Hello world","earth",6);
?>
echo substr_replace("Hello world","earth",6);
?>
Run example »
Example 2
Start replacing at the 5th position from the end of the string (replace "world" with "earth"):
<?php
echo substr_replace("Hello world","earth",-5);
?>
echo substr_replace("Hello world","earth",-5);
?>
Run example »
Example 3
Insert "Hello" at the beginning of "world":
<?php
echo substr_replace("world","Hello ",0,0);
?>
echo substr_replace("world","Hello ",0,0);
?>
Run example »
Example 4
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));
?>
$replace = array("1: AAA","2: AAA","3: AAA");
echo implode("<br>",substr_replace($replace,'BBB',3,3));
?>
Run example »
Complete PHP String Reference
Your suggestion:
Close [X]
Thank You For Helping Us!
Your message has been sent to W3Schools.
Close [X]
