What steps can be taken to troubleshoot and debug issues with displaying special characters in PHP form fields?

Special characters not displaying correctly in PHP form fields can be due to encoding issues. To troubleshoot this problem, ensure that the form is using the correct character encoding, such as UTF-8. Additionally, make sure that the data is properly sanitized and escaped before being displayed to prevent any potential security vulnerabilities. 

// Set the character encoding to UTF-8
header('Content-Type: text/html; charset=utf-8');

// Sanitize and escape the form input before displaying
$special_characters = htmlspecialchars($_POST['special_characters'], ENT_QUOTES, 'UTF-8');

// Display the sanitized input
echo $special_characters;

Keywords

UTF-8 htmlspecialchars mb_detect_encoding htmlentities character encoding

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