How can passing parameters through URL parameters be a potential security risk when calling PHP functions?

Passing parameters through URL parameters can be a potential security risk when calling PHP functions because it exposes the parameters directly in the URL, making them visible to anyone who has access to it. This can lead to sensitive information being exposed or manipulated by malicious users. To mitigate this risk, it is recommended to sanitize and validate the parameters before using them in PHP functions. 

// Sanitize and validate parameters passed through URL parameters
$param1 = isset($_GET['param1']) ? filter_var($_GET['param1'], FILTER_SANITIZE_STRING) : '';
$param2 = isset($_GET['param2']) ? filter_var($_GET['param2'], FILTER_VALIDATE_INT) : 0;

// Call PHP function with sanitized and validated parameters
$result = myFunction($param1, $param2);

Keywords

URL parameters security risk PHP functions injection attacks data validation

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