How can hidden input fields be utilized to transfer variables between PHP files?

Hidden input fields can be utilized to transfer variables between PHP files by setting the variable value in a hidden input field within a form on one PHP file and then submitting the form to another PHP file. The second PHP file can then retrieve the variable value from the hidden input field using $_POST or $_GET superglobals. 

// First PHP file (form.php)
<form action="process.php" method="post">
    <input type="hidden" name="hidden_variable" value="value_to_transfer">
    <input type="submit" value="Submit">
</form>

// Second PHP file (process.php)
$hidden_variable = $_POST['hidden_variable'];
echo $hidden_variable; // Output: value_to_transfer

Keywords

hidden input fields variables transfer PHP files utilization

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