How can PHP be used to redirect to a different page based on form input validation?

To redirect to a different page based on form input validation in PHP, you can use the header() function to send a raw HTTP header to the browser. You can check the form input validation condition and then redirect the user to a different page accordingly. 

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Perform form input validation
    if (/* validation condition */) {
        header("Location: success.php");
        exit;
    } else {
        header("Location: error.php");
        exit;
    }
}
?>

Keywords

PHP form input validation redirect header location

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