How can hidden fields in forms be used to pass variables between pages in PHP?

Hidden fields in forms can be used to pass variables between pages in PHP by storing the variable's value in a hidden input field within a form. When the form is submitted, the variable's value is sent along with the rest of the form data to the next page. This allows for the variable to be accessed and used on the subsequent page. 

// Page 1: form with hidden field to pass variable
<form action="page2.php" method="post">
    <input type="hidden" name="hidden_variable" value="variable_value">
    <input type="submit" value="Submit">
</form>

// Page 2: retrieve hidden variable value
<?php
$hidden_variable = $_POST['hidden_variable'];
echo $hidden_variable; // Output: variable_value
?>

Keywords

hidden fields forms variables pass pages

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