What are common misconceptions about using Ajax with PHP?

One common misconception about using Ajax with PHP is that you cannot directly access PHP variables in your JavaScript code. However, you can actually pass data between your PHP and JavaScript code using JSON. By encoding your PHP data into JSON format and then decoding it in your JavaScript code, you can easily access and manipulate PHP variables in your Ajax requests.

<?php
// PHP code to encode data into JSON format
$data = array('name' => 'John', 'age' => 30);
$json_data = json_encode($data);
?>

<script>
// JavaScript code to decode JSON data and access PHP variables
var jsonData = <?php echo $json_data; ?>;
console.log(jsonData.name); // Output: John
console.log(jsonData.age); // Output: 30
</script>