What are the best practices for handling form data in PHP to avoid errors like not executing PHP code in the browser?

When handling form data in PHP, it is essential to sanitize and validate user input to prevent security vulnerabilities such as code injection. To avoid errors like not executing PHP code in the browser, always use htmlspecialchars() function to escape special characters and prevent scripts from running. This ensures that user input is treated as plain text and not as executable code. 

// Example of handling form data securely in PHP
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $username = htmlspecialchars($_POST["username"]);
    $password = htmlspecialchars($_POST["password"]);
    
    // Further validation and processing of form data
}

Keywords

PHP form data security validation escaping

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