What are some best practices for maintaining search engine friendliness while using mod_rewrite in PHP projects?

When using mod_rewrite in PHP projects, it is important to ensure that the URLs generated are search engine friendly. To maintain search engine friendliness, it is recommended to use descriptive keywords in the rewritten URLs, avoid using unnecessary parameters or query strings, and ensure proper redirection of old URLs to new ones. 

RewriteEngine On
RewriteRule ^products/([0-9]+)/([a-zA-Z0-9_-]+)$ product.php?id=$1&name=$2 [L]

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mod_rewrite search engine friendliness PHP projects best practices maintaining

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