What are the potential pitfalls of mixing PHP and JavaScript in web development?

One potential pitfall of mixing PHP and JavaScript in web development is that it can lead to messy and hard-to-maintain code. To solve this issue, it's recommended to separate PHP and JavaScript logic as much as possible by using AJAX calls to communicate between the two languages. 

// PHP code to handle AJAX request
if(isset($_POST['data'])){
    $data = $_POST['data'];
    
    // Perform PHP logic here
    
    echo json_encode($result);
}

Keywords

PHP JavaScript interoperability security vulnerabilities cross-site scripting

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