What are common errors that can occur when combining JavaScript and PHP?

One common error when combining JavaScript and PHP is not properly escaping PHP variables when outputting them in JavaScript code. This can lead to syntax errors or security vulnerabilities. To solve this, you should use PHP functions like `json_encode()` to safely output PHP variables in JavaScript code. 

<?php
// Example of properly escaping PHP variables in JavaScript code
$variable = "Hello, World!";
?>
<script>
var jsVariable = <?php echo json_encode($variable); ?>;
console.log(jsVariable);
</script>

Keywords

JavaScript PHP syntax error cross-origin AJAX

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