Send email with php_PHP tutorial

Here is the test file:

​ require("class.phpmailer.php"); //The downloaded file must be placed in the directory where the file is located
$mail = new PHPMailer(); //Create an email sending class
$address = "The email address of the user who received the email";//The email address of the user who received the email
$mail->IsSMTP(); //Send using SMTP
$mail->Host = "smtp.qq.com"; // Your business post office domain name
$mail->SMTPAuth = true; // Enable SMTP authentication function
 
//The following $mail->Username, $mail->Password, $mail->From are required
$mail->Username = "The email address of the user who sent the email"; // The email address of the user who sent the email
$mail->Password = "Password of the mailbox of the user who sent the mail"; // Password of the mailbox of the user who sent the mail
$mail->Port=25;
$mail->From = "The email address of the user who sent the email"; //Email address of the email sender
 
 
//$mail->FromName = "10-php";
$mail->AddAddress("$address",'The following recipient name is optional');//The recipient address can be replaced with any email mailbox you want to receive mail, the format is AddAddress(" Recipient email","Recipient name")
//$mail->AddReplyTo("", "");www.2cto.com
 
//$mail->AddAttachment("/var/tmp/file.tar.gz"); // Add attachment
//$mail->IsHTML(true); // set email format to HTML //Whether to use HTML format

$mail->Subject = "PHPMailer test email"; //Email title
$mail->Body = "Hello, this is a test email"; //Email content
$mail->AltBody = "This is the body in plain text for non-HTML mail clients"; //Additional information, can be omitted
If(!$mail->Send())
{
echo "Failed to send email.

";
echo "Error reason: " . $mail->ErrorInfo;
exit;
}
 
echo "Email sent successfully";