We recommend using SendGrid PHP, our client library, available on Github, with full documentation.

Using SendGrid’s PHP Library

1
2
3
4
5
6
7
8
9
10
// using SendGrid's PHP Library - https://github.com/sendgrid/sendgrid-php
$sendgrid = new SendGrid($api_user, $api_key);
$email    = new SendGrid\Email();

$email->addTo("test@sendgrid.com")
      ->setFrom("you@youremail.com")
      ->setSubject("Sending with SendGrid is Fun")
      ->setHtml("and easy to do anywhere, even with PHP");

$sendgrid->send($email);

Using PHP with cURL

If you choose not to use SendGrid’s client library you may use PHP’s cURL function to query the web API.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
<?php

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

$params = array(
    'api_user'  => $user,
    'api_key'   => $pass,
    'to'        => 'example3@sendgrid.com',
    'subject'   => 'testing from curl',
    'html'      => 'testing body',
    'text'      => 'testing body',
    'from'      => 'example@sendgrid.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);
// Tell PHP not to use SSLv3 (instead opting for TLS)
curl_setopt($session, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2);
curl_setopt($session, CURLOPT_RETURNTRANSFER, true);

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

// print everything out
print_r($response);

?>

An Email Sent Using the SMTPAPI Header

This example takes the previous example a step further by adding our SMTPAPI header to set a category and send out to multiple recipients. The category is called test_category, and the email will go out to both example1@sendgrid.com and example2@sendgrid.com. The normal to address, example3@sendgrid.com, will not receive an email.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
<?php

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

$json_string = array(

  'to' => array(
    'example1@sendgrid.com', 'example2@sendgrid.com'
  ),
  'category' => 'test_category'
);


$params = array(
    'api_user'  => $user,
    'api_key'   => $pass,
    'x-smtpapi' => json_encode($json_string),
    'to'        => 'example3@sendgrid.com',
    'subject'   => 'testing from curl',
    'html'      => 'testing body',
    'text'      => 'testing body',
    'from'      => 'example@sendgrid.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);
// Tell PHP not to use SSLv3 (instead opting for TLS)
curl_setopt($session, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2);
curl_setopt($session, CURLOPT_RETURNTRANSFER, true);

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

// print everything out
print_r($response);

?>

An Email Sent Including a File Attachment

This example adds the additional attachment parameter to attach a file called myfile. This example assumes the file is in the same directory as your code otherwise you need to specify the full path of the file in the \$filePath variable.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
<?php

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

$fileName = 'myfile';
$filePath = dirname(__FILE__);

$params = array(
    'api_user'  => $user,
    'api_key'   => $pass,
    'to'        => 'example@sendgrid.com',
    'subject'   => 'test of file sends',
    'html'      => '<p> the HTML </p>',
    'text'      => 'the plain text',
    'from'      => 'example@sendgrid.com',
    'files['.$fileName.']' => '@'.$filePath.'/'.$fileName
  );

print_r($params);

$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($session, CURLOPT_HEADER, false);
// Tell PHP not to use SSLv3 (instead opting for TLS)
curl_setopt($session, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2);
curl_setopt($session, CURLOPT_RETURNTRANSFER, true);

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

// print everything out
print_r($response);

?>