PHP substr() Function
 Complete PHP String Reference
Definition and Usage
The substr() function returns a part of a string.
Syntax
substr(string,start,length)
|
| Parameter |
Description |
| string |
Required. Specifies the string to return a part of |
| start |
Required. Specifies where to start in the string
- A positive number - Start at a specified position in the string
- A negative number - Start at a specified position from the end of the string
- 0 - Start at the first character in string
|
| length |
Optional. Specifies the length of the returned string.
Default is to the end of the string.
- A positive number - The length to be returned from the start
parameter
- Negative number - The length to be returned from the end
of the string
|
Tips and Notes
Note: If start is a negative number and length is less than or equal
to start, length becomes 0.
Example 1
<?php
echo substr("Hello world!",6);
?>
|
The output of the code above will be:
Example 2
<?php
echo substr("Hello world!",6,5);
?>
|
The output of the code above will be:
Complete PHP String Reference
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