Sample of using the Salsa API in PHP. Note that cookies must be passed to every call after authentication!

salsa_sample.php

<?php
// See https://salsasupport.zendesk.com/entries/23514381-Definitions-for-common-terms
// to find out to retrieve the API URL in $url.

$url = "https://API_URL/api";
$username = ""; # Campaign Manager username goes here
$password = ""; # Campaign Manager password goes here

// Method #1 for building post objects to send to Salsa
$authfields["email"] = $username;
$authfields["password"] = $password;

// Method #2 for building post objects to send to Salsa
// Note:  unless you have a small number of supporters, this will fail.
//        try removing the 'groupBy' => 'Date_Created' statement.
$fields = array('object' => 'supporter', 'groupBy' => 'Date_Created');

// Initialize cURL connection
// * See http://us3.php.net/manual/en/book.curl.php for more information
//   on the cURL capability in PHP.
$ch = curl_init();

// Set basic connection parameters
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 100);

// Set parameters to maintain cookies across sessions
curl_setopt($ch, CURLOPT_COOKIESESSION, TRUE);
curl_setopt($ch, CURLOPT_COOKIEFILE, '/tmp/cookies_file');
curl_setopt($ch, CURLOPT_COOKIEJAR, '/tmp/cookies_file');

//Execute connection to authenticate to Salsa
//* Example:
//  https://sandbox.salsalabs.com/api/authenticate.sjs?email=whatever&password=whatever

curl_setopt($ch, CURLOPT_URL, "$url/authenticate.sjs");
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($authfields));
$auth = curl_exec($ch);

// Execute query to return data back to the User/Application
// * Example:
//   https://sandbox.salsalabs.com/api/getCounts.sjs?object=supporter&groupBy=Date_Created
//
curl_setopt($ch, CURLOPT_URL, "$url/getCounts.sjs");
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($fields));
$count = curl_exec($ch);

//Close the connection
curl_close($ch);

// Populate results from salsa into SimpleXML object
// * See http://php.net/manual/en/book.simplexml.php for more
//   information on SimpleXML objects in PHP

$response = simplexml_load_string($count);

// Uncomment the next statement to see the contents of $response.
// * See http://us3.php.net/manual/en/function.print-r.php for more info.
// print_r($response);

// Parse SimpleXML object and display Date_Created for each entry to the screen.
foreach($response->supporter->count AS $data){
                echo "VALUE -> DATA: ";
                echo $data->Date_Created . "
 <br/>
";
}
?>