What are some potential pitfalls to be aware of when using JavaScript and PHP together in a web application?

One potential pitfall when using JavaScript and PHP together in a web application is the risk of exposing sensitive information from PHP to JavaScript. To prevent this, be cautious about what data you pass from PHP to JavaScript and avoid directly outputting sensitive information in JavaScript code. 

// Example of passing data from PHP to JavaScript safely
<?php
$secure_data = "This is sensitive data";
?>
<script>
var secure_data = <?php echo json_encode($secure_data); ?>;
</script>

Keywords

JavaScript PHP cross-origin security vulnerabilities data synchronization

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