How can PHP handle and manipulate form input variables from external pages?

To handle and manipulate form input variables from external pages in PHP, you can use the $_GET or $_POST superglobals to access the data sent from the form. You can then sanitize and validate the input data to ensure it is safe to use in your application. Finally, you can manipulate the input variables as needed for your specific use case. 

<?php
// Get the form input variables from external pages
$input_variable = $_POST['input_variable'];

// Sanitize and validate the input data
$input_variable = filter_var($input_variable, FILTER_SANITIZE_STRING);

// Manipulate the input variables as needed
$manipulated_variable = strtoupper($input_variable);

// Output the manipulated variable
echo $manipulated_variable;
?>

Keywords

PHP form input variables external pages handling manipulation

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