$to = 'test@example.com';
$subject = 'Test Subject';
$message = 'Test Message';
$headers = "From: test@example.net\r\nReply-To: text@example.net";
mail($to, $subject, $message, $headers);
mail('test@example.com', 'Test Subject', 'Test Message',
"From: test@example.net\r\nReply-To: text@example.net");
$to = 'test@example.com';
$subject = 'Test Subject';
$message = 'Test Message';
$headers = "From: test@example.net\r\nReply-To: text@example.net\r\n";
$headers.= "Content-Type: multipart/alternative; boundary=\"1234567890\"";
$message = <<<EOT
--1234567890
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
This is the text version of the message.
--1234567890
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
<p>This is the html version of the message.</p>
--1234567890--
EOT;
mail($to, $subject, $message, $headers);
$to = 'test@example.com';
$subject = 'Test Subject';
$message = 'Test Message';
$headers = "From: test@example.net\r\nReply-To: text@example.net";
$headers.= "Content-Type: multipart/mixed; boundary=\"1111111111\"";
$attachment = chunk_split(base64_encode(file_get_contents('attachment.zip')));
$message = <<<EOT
--1111111111
Content-Type: multipart/alternative; boundary="2222222222"
--2222222222
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
This is the text version of the message.
--2222222222
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
<p>This is the html version of the message.</p>
--2222222222--
--1111111111
Content-Type: application/zip; name="attachment.zip"
Content-Transfer-Encoding: base64
Content-Disposition: attachment
$attachment
--1111111111--
EOT;
mail($to, $subject, $message, $headers);
$to = 'test@example.com';
$subject = 'Test Subject';
$message = 'Test Message';
$headers = "From: test@example.net\r\nReply-To: text@example.net\r\n";
$headers.= "Cc: email@example.com\r\n";
$headers.= "Bcc: email@example.com\r\n";
mail($to, $subject, $message, $headers);
$to = 'test@example.com';
$subject = 'Test Subject';
$message = '<p>Test Message</p>';
$headers = "From: test@example.net\r\nReply-To: text@example.net\r\n";
$headers.= "MIME-Version: 1.0\r\n";
$headers.= "Content-type: text/html; charset=iso-8859-1\r\n";
mail($to, $subject, $message, $headers);