What are the implications of using GET parameters or session IDs in URLs for search engine indexing, and how can these be mitigated in PHP websites?

Using GET parameters or session IDs in URLs can cause issues with search engine indexing as it can create duplicate content and confuse search engine crawlers. To mitigate this issue in PHP websites, you can use URL rewriting to convert dynamic URLs with parameters into static URLs that are more search engine friendly. 

// URL rewriting to convert dynamic URLs with parameters into static URLs
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^/]*)/([^/]*)$ /index.php?page=$1&id=$2 [L]

Keywords

GET parameters session IDs URL structure search engine indexing PHP websites

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