How Can I Troubleshoot PHP's mail() Function Email Delivery Errors?

Troubleshooting Email Delivery with PHP's mail() Function

When attempting to send emails using PHP's mail() function, it's crucial to have a mechanism in place to handle potential errors. If an email fails to send, you'll want to be able to display an error message to the user.

Capturing Error Messages

Unfortunately, the mail() function itself does not provide an error message if the email fails to send. However, depending on your setup and operating system, there are ways to retrieve the error message.

Windows SMTP Support

If you're using SMTP on Windows, you can utilize the error_get_last() function to retrieve the error message when mail() returns false. However, keep in mind that this workaround only applies when using SMTP; it will not work with PHP's native mail() function.

Here's an example of how to use error_get_last() to get the error message:

$success = mail('john@example.com', 'My Subject', $message);
if (!$success) {
    $errorMessage = error_get_last()['message'];
}

When you print the error message using print_r(error_get_last()), you'll see a detailed description of the error, including the error type, message, file location, and line number.

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