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Clean Up Form Input

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        Basic cleanup of user form input.

// trim spaces from the beginning and the end of the variable
$field_name = trim($field_name);

// strip all HTML from the variables
$field_name = strip_tags($field_name);

// change the case of the variable to capitalize (It Will Look Like This - handy for Name fields)
$field_name = ucwords(strtolower($field_name));

// change the case of the first character to uppercase, the rest to lowercase (It will look like this)
$field_name = ucfirst(strtolower($field_name));

//change the case of the variable to lowercase
$field_name = strtolower($field_name);

// change the case of the variable to uppercase
$field_name = strtoupper($field_name);