What are the potential issues with using $_GET variables in PHP code, as seen in the provided forum thread?

Potential issues with using $_GET variables in PHP code include security vulnerabilities such as SQL injection and cross-site scripting attacks. To mitigate these risks, it is important to properly sanitize and validate any data received via $_GET before using it in your code. 

// Sanitize and validate the $_GET variable before using it
$id = isset($_GET['id']) ? filter_var($_GET['id'], FILTER_SANITIZE_NUMBER_INT) : null;

if($id !== null){
    // Proceed with using the sanitized $id variable in your code
}

Keywords

$_GET variables security vulnerabilities SQL injection cross-site scripting data validation

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