What potential issues can arise when converting special characters in a PHP form submitted via the POST method?

Potential issues that can arise when converting special characters in a PHP form submitted via the POST method include data loss or corruption if the conversion is not handled properly. To solve this issue, you can use the htmlspecialchars() function in PHP to convert special characters to HTML entities before processing the form data. 

// Convert special characters in form data submitted via POST method
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    foreach ($_POST as $key => $value) {
        $_POST[$key] = htmlspecialchars($value);
    }
}

Keywords

htmlspecialchars htmlentities character encoding cross-site scripting form validation

Related Questions