How can PHP developers ensure that only authorized code is executed when using functions like eval() or include()?

To ensure that only authorized code is executed when using functions like eval() or include(), PHP developers should validate and sanitize user input before passing it to these functions. This can help prevent code injection attacks and unauthorized access to sensitive information. 

$user_input = $_POST['user_input'];

// Validate and sanitize user input
$validated_input = filter_var($user_input, FILTER_SANITIZE_STRING);

// Execute authorized code
eval($validated_input);

Keywords

PHP eval() include() security authorization

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