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What are the advantages and disadvantages of using inline styling versus external CSS classes for dynamic element styling in PHP-generated HTML?

When dynamically generating HTML in PHP, it is generally better to use external CSS classes for styling rather than inline styling. Using external CSS classes promotes better separation of concerns, makes styling more consistent across the website, and allows for easier maintenance and updates. Inline styling can lead to bloated HTML files, decreased readability, and a higher chance of style conflicts.

php 
```php
// Using external CSS classes for dynamic element styling
echo '<div class="dynamic-element">Dynamic content</div>';
```
In the above code snippet, the dynamic element is styled using an external CSS class called "dynamic-element". This promotes better organization and maintainability of the styling.

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