PHP substr_replace() Function
 Complete PHP String Reference
Definition and Usage
The substr_replace() function replaces a part of a string with another string.
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
- A positive number - Start replacing at the specified position in the string
- Negative number - Start replacing at the specified position from the end of the string
- 0 - 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 replaced
- A negative number - How many characters should be left at end of string
after replacing
- 0 - Insert instead of replace
|
Tips and Notes
Note: If start is a negative number and length is less than or equal
to start, length becomes 0.
Example
<?php
echo substr_replace("Hello world","earth",6);
?>
|
The output of the code above will be:
Complete PHP String Reference
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