PHP strtoupper() Function
Example
Convert all characters to uppercase:
<?php
echo strtoupper("Hello WORLD!");
?>
Try it Yourself »
Definition and Usage
The strtoupper() function converts a string to uppercase.
Note: This function is binary-safe.
Related functions:
- strtolower() - converts a string to lowercase
- lcfirst() - converts the first character of a string to lowercase
- ucfirst() - converts the first character of a string to uppercase
- ucwords() - converts the first character of each word in a string to uppercase
Syntax
strtoupper(string)
Parameter Values
| Parameter | Description |
|---|---|
| string | Required. Specifies the string to convert |
Technical Details
| Return Value: | Returns the the uppercased string |
|---|---|
| PHP Version: | 4+ |
❮ PHP String Reference
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