How can debugging techniques be effectively used to troubleshoot issues with Captcha validation in PHP?

Issue: Captcha validation in PHP is not working correctly, causing errors in form submission. To troubleshoot this issue, we can use debugging techniques such as printing out the Captcha values and comparing them with the user input to identify any discrepancies. 

// Validate Captcha
$captcha = $_POST['captcha'];
$correctCaptcha = $_SESSION['captcha'];

if ($captcha == $correctCaptcha) {
    // Captcha validation successful
    // Process form submission
} else {
    // Captcha validation failed
    echo "Incorrect Captcha entered. Please try again.";
}

Keywords

debugging Captcha validation PHP troubleshooting error types

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