email-php.php

<!-- Using PHP's mail() function-->

<?php
$to      = 'someone@example.com';
$subject = 'Subject line goes here';
$message = 'Hi, this is me!';
$headers = 'From: info@example.com' . "\r\n" .
    'Reply-To: no-reply@example.com' . "\r\n" .
    'X-Mailer: PHP/' . phpversion();

mail($to, $subject, $message, $headers);
?> 

<!-- Using cur with Sendgrid -->

<?php

 $url = 'https://api.sendgrid.com/';
 $user = 'USERNAME';
 $pass = 'PASSWORD'; 

 $params = array(
      'api_user' => $user,
      'api_key' => $pass,
      'to' => 'john@contoso.com',
      'subject' => 'testing from curl',
      'html' => 'testing body',
      'text' => 'testing body',
      'from' => 'anna@contoso.com',
   );

 $request = $url.'api/mail.send.json';

 // Generate curl request
 $session = curl_init($request);

 // Tell curl to use HTTP POST
 curl_setopt ($session, CURLOPT_POST, true);

 // Tell curl that this is the body of the POST
 curl_setopt ($session, CURLOPT_POSTFIELDS, $params);

 // Tell curl not to return headers, but do return the response
 curl_setopt($session, CURLOPT_HEADER, false);
 curl_setopt($session, CURLOPT_RETURNTRANSFER, true);

 // obtain response
 $response = curl_exec($session);
 curl_close($session);

 // print everything out
 print_r($response);