How can the issue of being redirected to "/undefined" instead of the intended URL be resolved when using jQuery for redirection in PHP?

The issue of being redirected to "/undefined" instead of the intended URL when using jQuery for redirection in PHP can be resolved by ensuring that the URL being passed to the jQuery function is properly defined. This can be done by checking if the URL variable is set before redirecting. If the URL is not set, then a default URL can be used instead. 

<?php
$url = isset($_POST['url']) ? $_POST['url'] : 'default_url.php';
?>

<script>
$(document).ready(function(){
    var url = "<?php echo $url; ?>";
    if(url !== "") {
        window.location.replace(url);
    }
});
</script>

Keywords

PHP jQuery redirection URL troubleshooting

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