What are some common mistakes beginners make when integrating PHP and jQuery in their code?

One common mistake beginners make when integrating PHP and jQuery is not properly escaping PHP output within JavaScript code, leading to syntax errors or security vulnerabilities. To solve this issue, use PHP's `json_encode()` function to safely encode PHP data for use in JavaScript.

<?php
// PHP code to pass data to JavaScript using json_encode
$data = array(
    'name' => 'John Doe',
    'age' => 25
);
?>

<script>
// JavaScript code to access PHP data using json_encode
var data = <?php echo json_encode($data); ?>;
console.log(data);
</script>