What are the potential issues when mixing PHP code with HTML in a web development project?

One potential issue when mixing PHP code with HTML is that it can make the code harder to read and maintain, especially for developers who are not familiar with PHP. To solve this, it's recommended to separate PHP logic from HTML markup by using PHP templates or frameworks like Laravel or Symfony. 

<?php
// Separate PHP logic from HTML markup using PHP templates

// Define PHP logic
$variable = "Hello, World!";

// Include PHP template file
include 'template.php';
?>
```

In the `template.php` file:
```html
<!DOCTYPE html>
<html>
<head>
    <title>PHP Template Example</title>
</head>
<body>
    <h1><?php echo $variable; ?></h1>
</body>
</html>

Keywords

PHP HTML syntax errors XSS vulnerabilities separation of concerns

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