Are there any best practices or recommendations for converting text input to uppercase in PHP for validation purposes?

When validating user input, it's often necessary to convert text to uppercase for consistency and comparison purposes. To convert text to uppercase in PHP, you can use the strtoupper() function. This function takes a string as input and returns the string with all alphabetic characters converted to uppercase.

$input = "example text";
$uppercase_input = strtoupper($input);

echo $uppercase_input;