What are the potential pitfalls of using echo to generate HTML content in PHP?

Using echo to generate HTML content in PHP can lead to messy and hard-to-read code, especially when dealing with a large amount of HTML. It can also make it difficult to maintain and update the code in the future. To solve this issue, it's recommended to separate the HTML content from the PHP logic by using alternative methods such as heredoc syntax or separating the HTML into a separate file. 

// Example using heredoc syntax to separate HTML content
$html = <<<HTML
<div>
    <h1>Welcome</h1>
    <p>Hello, world!</p>
</div>
HTML;

echo $html;

Keywords

echo HTML content XSS vulnerability security risk sanitization.

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