What are the potential pitfalls of using a large number of GET variables in PHP applications?

Using a large number of GET variables in PHP applications can lead to security vulnerabilities such as injection attacks and data manipulation. To mitigate this risk, it is recommended to validate and sanitize all incoming data before using it in your application. 

// Example of validating and sanitizing GET variables
$var1 = isset($_GET['var1']) ? filter_var($_GET['var1'], FILTER_SANITIZE_STRING) : '';
$var2 = isset($_GET['var2']) ? filter_var($_GET['var2'], FILTER_SANITIZE_NUMBER_INT) : 0;
$var3 = isset($_GET['var3']) ? filter_var($_GET['var3'], FILTER_VALIDATE_EMAIL) : '';

Keywords

GET variables PHP applications performance security vulnerabilities code readability

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