What potential issues can arise when using mod_rewrite to hide query parameters in PHP URLs?

One potential issue that can arise when using mod_rewrite to hide query parameters in PHP URLs is that it can make debugging and troubleshooting more difficult, as the actual parameters are not visible in the URL. To solve this, you can use the $_GET superglobal array in PHP to access the query parameters even if they are hidden in the URL. 

// Example of accessing query parameters using $_GET
if(isset($_GET['param1'])) {
    $param1 = $_GET['param1'];
    // Use $param1 in your code
}

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