how to change all input field values into upper case

Question

I have set of PHP fields.

Before sending the values into a query, I want to change the letters to upper case.

Is there a way to do something like:

$cust_name   = "john";
$cust_gender = "male";

lower_upper_conversion($_);

so that now john has changed to JOHN, and male has changed to MALE?

After this function is crossed or passed, all variables need to change into upper case.

I do not want normal solution where I have to call for each field:

$cust_name   = "john";
$cust_gender = "male";

lower_upper_conversion($cust_name);
lower_upper_conversion($cust_gender);
JOHN , MALE, 

Answer 1

$_POST = array_map("strtoupper", $_POST);

This will make all values in the POSTed form upper case.

There is no general method to apply a function to all variables in scope. They need to be in an array first.

Answer 2

You want to use strtoupper

$cust_name = "john";
echo strtoupper($cust_name); // Outputs JOHN

Answer 3

Is this what you are after? http://php.net/strtoupper