How can a submit button in PHP be assigned multiple actions, such as opening a new window/tab and redirecting to another page?

To assign multiple actions to a submit button in PHP, you can use JavaScript to handle the opening of a new window/tab and then use PHP to redirect to another page. You can achieve this by adding an onclick event to the submit button that triggers the JavaScript function to open a new window/tab, followed by a PHP header redirect to the desired page. 

<form method="post" action="">
    <input type="submit" name="submit" value="Submit" onclick="openNewTab();">
</form>

<script>
    function openNewTab() {
        window.open('new_page.php', '_blank');
    }
</script>

<?php
if (isset($_POST['submit'])) {
    header("Location: redirect_page.php");
    exit();
}
?>

Keywords

PHP submit button multiple actions new window redirect.

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