Are there potential pitfalls in mixing PHP and JavaScript code for passing data to HTML elements?

Mixing PHP and JavaScript code for passing data to HTML elements can lead to potential pitfalls such as code readability issues, debugging difficulties, and security vulnerabilities if not properly sanitized. To solve this, it's recommended to separate PHP logic from JavaScript code by using PHP to echo out data into JavaScript variables or data attributes in HTML elements. 

<?php
$data = "Hello, world!";
?>

<script>
  var dataFromPHP = "<?php echo $data; ?>";
  document.getElementById("myElement").innerHTML = dataFromPHP;
</script>

<div id="myElement"></div>

Keywords

PHP JavaScript data passing HTML elements potential errors

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