What potential pitfalls should be considered when using PHP functions with parameters from input buttons?

When using PHP functions with parameters from input buttons, it is important to validate and sanitize the input to prevent security vulnerabilities such as SQL injection or cross-site scripting attacks. Always sanitize and validate user input before passing it to a PHP function to ensure that only expected and safe values are used. 

// Example of validating and sanitizing input before using it in a PHP function
if(isset($_POST['submit'])){
    $input = $_POST['input_value'];
    
    // Validate and sanitize input
    $sanitized_input = filter_var($input, FILTER_SANITIZE_STRING);
    
    // Pass sanitized input to a PHP function
    myFunction($sanitized_input);
}

function myFunction($param){
    // Function logic here
}

Keywords

PHP functions parameters input buttons security vulnerabilities data validation

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