Definition
The substr_replace() function is used to replace a part of a string with another string.
Syntax
substr_replace(string, replacement, start, length)
Parameters
| 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 A positive number - Start replacing at the specified position in the stringNegative number - Start replacing at the specified position from the end of the string0 - Start replacing at the first character in the string |
length |
Optional. Specifies how many characters should be replaced. Default is the same length as the string. A positive number - The length of string to be replacedA negative number - How many characters should be left at end of string after replacing0 - Insert instead of replace |
Example
<?php
echo substr_replace("Welcome to Earth!", "PHP", 11);