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How can debugging be effectively utilized to troubleshoot issues with sending emails in PHP?

To troubleshoot issues with sending emails in PHP, one effective way is to use debugging techniques such as printing out variables, checking error logs, and using tools like Xdebug to step through the code line by line. By carefully examining the code and output, you can identify where the issue lies and make necessary adjustments to fix it.

php 
// Example PHP code snippet for debugging email sending issues
// Enable error reporting and display errors
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Send a test email to check if the email sending functionality is working
$to = "recipient@example.com";
$subject = "Test Email";
$message = "This is a test email to check email sending functionality.";
$headers = "From: sender@example.com";

if (mail($to, $subject, $message, $headers)) {
    echo "Email sent successfully.";
} else {
    echo "Email sending failed. Check error logs for more information.";
}

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