strtoupper
string strtoupper(string string) Convert a string to uppercase.
Returns:
Uppercase string
Description:
strtoupper() converts all lowercase alphabetical characters within a string to their uppercase equivalents.
Note:
The conversion from lowercase to uppercase is dependent upon the current locale. Use setlocale() to set or query the locale.
Version:
PHP 3+, PHP 4+
See also:
To alter the case of a string:
strtolower() ucfirst() ucwords()
Example:
Make a string uppercase
<?php
$email_subject = "Hello, my name is loud howard.";
echo strtoupper ($email_subject);
?>
Output:
HELLO, MY NAME IS LOUD HOWARD.
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