In PHP, what is the significance of accessing data sent through form submissions using the $_POST superglobal array, and how can it be used effectively in handling button IDs?

When handling form submissions in PHP, accessing data sent through the $_POST superglobal array is crucial. This allows you to retrieve values submitted via POST method in form inputs. To effectively handle button IDs, you can set the 'name' attribute of the button in the form and check for its existence in the $_POST array to determine which button was clicked. 

<form method="post">
    <button type="submit" name="button1" value="1">Button 1</button>
    <button type="submit" name="button2" value="2">Button 2</button>
</form>

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    if (isset($_POST['button1'])) {
        // Button 1 was clicked
        echo "Button 1 clicked!";
    } elseif (isset($_POST['button2'])) {
        // Button 2 was clicked
        echo "Button 2 clicked!";
    }
}
?>

Keywords

PHP $_POST superglobal array form submissions button IDs data access

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