What are some best practices for handling POST variables in PHP to prevent script execution on page reload?

When handling POST variables in PHP, it is important to sanitize and validate the input to prevent script execution on page reload. One way to achieve this is by using PHP's filter_input function with FILTER_SANITIZE_STRING or FILTER_SANITIZE_SPECIAL_CHARS filter. By doing so, you can ensure that the input is safe to use and does not pose a security risk. 

// Sanitize and validate POST variable
$input_data = filter_input(INPUT_POST, 'input_data', FILTER_SANITIZE_STRING);

// Prevent script execution on page reload
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    // Process the sanitized input data
    // Your code here
}

Keywords

POST variables PHP script execution page reload security

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