PHP strtoupper() Function Usage and Example

　 　 PHP String Character String Function Manual

　 　 The strtoupper() function is used to convert strings to uppercase.

Syntax

string strtoupper ( string $string )

Definition and Usage

　Converts all letter characters in string to uppercase and returns.

Related Functions:

• strtolower() - Converts the string to lowercase

• lcfirst() - Converts the first character of the string to lowercase

• ucfirst() - Converts the first character of the string to uppercase

• ucwords() - Converts the first character of each word in the string to uppercase

Return Value

Returns the uppercase string.

Parameter

Online Example

Try the following example to convert all strings to uppercase:

<?php
　　　　//strtoupper() Function, Converts All Strings to Uppercase:
　　　echo　strtoupper("www.oldtoolbag.com");
?>

Output Result

www.oldtoolbag.com

PHP String Character String Function Manual