What are the security implications of relying on client-side data for time measurements in PHP quiz applications?

Relying on client-side data for time measurements in PHP quiz applications can lead to potential security vulnerabilities such as data manipulation or injection. To mitigate this risk, it is recommended to perform time measurements on the server-side to ensure the accuracy and integrity of the data. 

// Server-side time measurement example
$start_time = microtime(true);

// Perform quiz logic here

$end_time = microtime(true);
$total_time = $end_time - $start_time;

echo "Total time taken: " . $total_time . " seconds";

Keywords

client-side data time measurements security implications PHP quiz applications

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