How can PHP developers handle situations where the results of email address verification in PHP differ from those obtained through online tools?

When the results of email address verification in PHP differ from those obtained through online tools, PHP developers can handle this situation by using multiple email validation methods, such as checking for the presence of MX records, sending a verification email, and using regular expressions to validate the email format. By combining these methods, developers can achieve more accurate email address verification results. 

function verifyEmail($email) {
    $result1 = checkMXRecord($email);
    $result2 = sendVerificationEmail($email);
    $result3 = validateEmailFormat($email);

    if ($result1 && $result2 && $result3) {
        return true;
    } else {
        return false;
    }
}

function checkMXRecord($email) {
    list($user, $domain) = explode('@', $email);
    return checkdnsrr($domain, 'MX');
}

function sendVerificationEmail($email) {
    // Code to send a verification email
    // Return true if email is valid after verification, false otherwise
}

function validateEmailFormat($email) {
    return filter_var($email, FILTER_VALIDATE_EMAIL);
}

$email = "example@example.com";
if (verifyEmail($email)) {
    echo "Email address is valid.";
} else {
    echo "Email address is not valid.";
}

Keywords

email address verification PHP online tools discrepancy error handling

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