What are common challenges faced when trying to make a PHP forum search engine friendly?

One common challenge faced when trying to make a PHP forum search engine friendly is dynamically generated URLs that do not contain relevant keywords. To solve this issue, you can implement URL rewriting using Apache's mod_rewrite module to create search engine friendly URLs that include keywords related to the forum topic. 

```php
RewriteEngine On
RewriteRule ^forum/([0-9]+)/([a-zA-Z0-9_-]+)$ forum.php?id=$1&title=$2 [L]
```
This code snippet uses mod_rewrite to rewrite URLs from `forum.php?id=1&title=my_forum_topic` to `forum/1/my_forum_topic`, making them more search engine friendly.

Keywords

SEO URL rewriting meta tags sitemap duplicate content

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