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<?php
/**
* GAPI - Google Analytics PHP Interface
*
* http://code.google.com/p/gapi-google-analytics-php-interface/
*
* @copyright Stig Manning 2009
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @author Stig Manning <stig@sdm.co.nz>
* @version 1.3
*
*/
class gapi
{
const http_interface = 'auto'; //'auto': autodetect, 'curl' or 'fopen'
const client_login_url = 'https://www.google.com/accounts/ClientLogin';
const account_data_url = 'https://www.google.com/analytics/feeds/accounts/default';
const report_data_url = 'https://www.google.com/analytics/feeds/data';
const interface_name = 'GAPI-1.3';
const dev_mode = false;
private $auth_token = null;
private $account_entries = array();
private $account_root_parameters = array();
private $report_aggregate_metrics = array();
private $report_root_parameters = array();
private $results = array();
/**
* Constructor function for all new gapi instances
*
* Set up authenticate with Google and get auth_token
*
* @param String $email
* @param String $password
* @param String $token
* @return gapi
*/
public function __construct($email, $password, $token=null)
{
if($token !== null)
{
$this->auth_token = $token;
}
else
{
$this->authenticateUser($email,$password);
}
}
/**
* Return the auth token, used for storing the auth token in the user session
*
* @return String
*/
public function getAuthToken()
{
return $this->auth_token;
}
/**
* Request account data from Google Analytics
*
* @param Int $start_index OPTIONAL: Start index of results
* @param Int $max_results OPTIONAL: Max results returned
*/
public function requestAccountData($start_index=1, $max_results=20)
{
$response = $this->httpRequest(gapi::account_data_url, array('start-index'=>$start_index,'max-results'=>$max_results), null, $this->generateAuthHeader());
if(substr($response['code'],0,1) == '2')
{
return $this->accountObjectMapper($response['body']);
}
else
{
throw new Exception('GAPI: Failed to request account data. Error: "' . strip_tags($response['body']) . '"');
}
}
/**
* Request report data from Google Analytics
*
* $report_id is the Google report ID for the selected account
*
* $parameters should be in key => value format
*
* @param String $report_id
* @param Array $dimensions Google Analytics dimensions e.g. array('browser')
* @param Array $metrics Google Analytics metrics e.g. array('pageviews')
* @param Array $sort_metric OPTIONAL: Dimension or dimensions to sort by e.g.('-visits')
* @param String $filter OPTIONAL: Filter logic for filtering results
* @param String $start_date OPTIONAL: Start of reporting period
* @param String $end_date OPTIONAL: End of reporting period
* @param Int $start_index OPTIONAL: Start index of results
* @param Int $max_results OPTIONAL: Max results returned
*/
public function requestReportData($report_id, $dimensions, $metrics, $sort_metric=null, $filter=null, $start_date=null, $end_date=null, $start_index=1, $max_results=30)
{
$parameters = array('ids'=>'ga:' . $report_id);
if(is_array($dimensions))
{
$dimensions_string = '';
foreach($dimensions as $dimesion)
{
$dimensions_string .= ',ga:' . $dimesion;
}
$parameters['dimensions'] = substr($dimensions_string,1);
}
else
{
$parameters['dimensions'] = 'ga:'.$dimensions;
}
if(is_array($metrics))
{
$metrics_string = '';
foreach($metrics as $metric)
{
$metrics_string .= ',ga:' . $metric;
}
$parameters['metrics'] = substr($metrics_string,1);
}
else
{
$parameters['metrics'] = 'ga:'.$metrics;
}
if($sort_metric==null&&isset($parameters['metrics']))
{
$parameters['sort'] = $parameters['metrics'];
}
elseif(is_array($sort_metric))
{
$sort_metric_string = '';
foreach($sort_metric as $sort_metric_value)
{
//Reverse sort - Thanks Nick Sullivan
if (substr($sort_metric_value, 0, 1) == "-")
{
$sort_metric_string .= ',-ga:' . substr($sort_metric_value, 1); // Descending
}
else
{
$sort_metric_string .= ',ga:' . $sort_metric_value; // Ascending
}
}
$parameters['sort'] = substr($sort_metric_string, 1);
}
else
{
if (substr($sort_metric, 0, 1) == "-")
{
$parameters['sort'] = '-ga:' . substr($sort_metric, 1);
}
else
{
$parameters['sort'] = 'ga:' . $sort_metric;
}
}
if($filter!=null)
{
$filter = $this->processFilter($filter);
if($filter!==false)
{
$parameters['filters'] = $filter;
}
}
if($start_date==null)
{
$start_date=date('Y-m-d',strtotime('1 month ago'));
}
$parameters['start-date'] = $start_date;
if($end_date==null)
{
$end_date=date('Y-m-d');
}
$parameters['end-date'] = $end_date;
$parameters['start-index'] = $start_index;
$parameters['max-results'] = $max_results;
$parameters['prettyprint'] = gapi::dev_mode ? 'true' : 'false';
$response = $this->httpRequest(gapi::report_data_url, $parameters, null, $this->generateAuthHeader());
//HTTP 2xx
if(substr($response['code'],0,1) == '2')
{
return $this->reportObjectMapper($response['body']);
}
else
{
throw new Exception('GAPI: Failed to request report data. Error: "' . strip_tags($response['body']) . '"');
}
}
/**
* Process filter string, clean parameters and convert to Google Analytics
* compatible format
*
* @param String $filter
* @return String Compatible filter string
*/
protected function processFilter($filter)
{
$valid_operators = '(!~|=~|==|!=|>|<|>=|<=|=@|!@)';
$filter = preg_replace('/\s\s+/',' ',trim($filter)); //Clean duplicate whitespace
$filter = str_replace(array(',',';'),array('\,','\;'),$filter); //Escape Google Analytics reserved characters
$filter = preg_replace('/(&&\s*|\|\|\s*|^)([a-z]+)(\s*' . $valid_operators . ')/i','$1ga:$2$3',$filter); //Prefix ga: to metrics and dimensions
$filter = preg_replace('/[\'\"]/i','',$filter); //Clear invalid quote characters
$filter = preg_replace(array('/\s*&&\s*/','/\s*\|\|\s*/','/\s*' . $valid_operators . '\s*/'),array(';',',','$1'),$filter); //Clean up operators
if(strlen($filter)>0)
{
return urlencode($filter);
}
else
{
return false;
}
}
/**
* Report Account Mapper to convert the XML to array of useful PHP objects
*
* @param String $xml_string
* @return Array of gapiAccountEntry objects
*/
protected function accountObjectMapper($xml_string)
{
$xml = simplexml_load_string($xml_string);
$this->results = null;
$results = array();
$account_root_parameters = array();
//Load root parameters
$account_root_parameters['updated'] = strval($xml->updated);
$account_root_parameters['generator'] = strval($xml->generator);
$account_root_parameters['generatorVersion'] = strval($xml->generator->attributes());
$open_search_results = $xml->children('http://a9.com/-/spec/opensearchrss/1.0/');
foreach($open_search_results as $key => $open_search_result)
{
$report_root_parameters[$key] = intval($open_search_result);
}
$account_root_parameters['startDate'] = strval($open_search_result->startDate);
$account_root_parameters['endDate'] = strval($open_search_result->endDate);
//Load result entries
foreach($xml->entry as $entry)
{
$properties = array();
foreach($entry->children('http://schemas.google.com/analytics/2009')->property as $property)
{
$properties[str_replace('ga:','',$property->attributes()->name)] = strval($property->attributes()->value);
}
$properties['title'] = strval($entry->title);
$properties['updated'] = strval($entry->updated);
$results[] = new gapiAccountEntry($properties);
}
$this->account_root_parameters = $account_root_parameters;
$this->results = $results;
return $results;
}
/**
* Report Object Mapper to convert the XML to array of useful PHP objects
*
* @param String $xml_string
* @return Array of gapiReportEntry objects
*/
protected function reportObjectMapper($xml_string)
{
$xml = simplexml_load_string($xml_string);
$this->results = null;
$results = array();
$report_root_parameters = array();
$report_aggregate_metrics = array();
//Load root parameters
$report_root_parameters['updated'] = strval($xml->updated);
$report_root_parameters['generator'] = strval($xml->generator);
$report_root_parameters['generatorVersion'] = strval($xml->generator->attributes());
$open_search_results = $xml->children('http://a9.com/-/spec/opensearchrss/1.0/');
foreach($open_search_results as $key => $open_search_result)
{
$report_root_parameters[$key] = intval($open_search_result);
}
$google_results = $xml->children('http://schemas.google.com/analytics/2009');
foreach($google_results->dataSource->property as $property_attributes)
{
$report_root_parameters[str_replace('ga:','',$property_attributes->attributes()->name)] = strval($property_attributes->attributes()->value);
}
$report_root_parameters['startDate'] = strval($google_results->startDate);
$report_root_parameters['endDate'] = strval($google_results->endDate);
//Load result aggregate metrics
foreach($google_results->aggregates->metric as $aggregate_metric)
{
$metric_value = strval($aggregate_metric->attributes()->value);
//Check for float, or value with scientific notation
if(preg_match('/^(\d+\.\d+)|(\d+E\d+)|(\d+.\d+E\d+)$/',$metric_value))
{
$report_aggregate_metrics[str_replace('ga:','',$aggregate_metric->attributes()->name)] = floatval($metric_value);
}
else
{
$report_aggregate_metrics[str_replace('ga:','',$aggregate_metric->attributes()->name)] = intval($metric_value);
}
}
//Load result entries
foreach($xml->entry as $entry)
{
$metrics = array();
foreach($entry->children('http://schemas.google.com/analytics/2009')->metric as $metric)
{
$metric_value = strval($metric->attributes()->value);
//Check for float, or value with scientific notation
if(preg_match('/^(\d+\.\d+)|(\d+E\d+)|(\d+.\d+E\d+)$/',$metric_value))
{
$metrics[str_replace('ga:','',$metric->attributes()->name)] = floatval($metric_value);
}
else
{
$metrics[str_replace('ga:','',$metric->attributes()->name)] = intval($metric_value);
}
}
$dimensions = array();
foreach($entry->children('http://schemas.google.com/analytics/2009')->dimension as $dimension)
{
$dimensions[str_replace('ga:','',$dimension->attributes()->name)] = strval($dimension->attributes()->value);
}
$results[] = new gapiReportEntry($metrics,$dimensions);
}
$this->report_root_parameters = $report_root_parameters;
$this->report_aggregate_metrics = $report_aggregate_metrics;
$this->results = $results;
return $results;
}
/**
* Authenticate Google Account with Google
*
* @param String $email
* @param String $password
*/
protected function authenticateUser($email, $password)
{
$post_variables = array(
'accountType' => 'GOOGLE',
'Email' => $email,
'Passwd' => $password,
'source' => gapi::interface_name,
'service' => 'analytics'
);
$response = $this->httpRequest(gapi::client_login_url,null,$post_variables);
//Convert newline delimited variables into url format then import to array
parse_str(str_replace(array("\n","\r\n"),'&',$response['body']),$auth_token);
if(substr($response['code'],0,1) != '2' || !is_array($auth_token) || empty($auth_token['Auth']))
{
throw new Exception('GAPI: Failed to authenticate user. Error: "' . strip_tags($response['body']) . '"');
}
$this->auth_token = $auth_token['Auth'];
}
/**
* Generate authentication token header for all requests
*
* @return Array
*/
protected function generateAuthHeader()
{
return array('Authorization: GoogleLogin auth=' . $this->auth_token);
}
/**
* Perform http request
*
*
* @param Array $get_variables
* @param Array $post_variables
* @param Array $headers
*/
protected function httpRequest($url, $get_variables=null, $post_variables=null, $headers=null)
{
$interface = gapi::http_interface;
if(gapi::http_interface =='auto')
{
if(function_exists('curl_exec'))
{
$interface = 'curl';
}
else
{
$interface = 'fopen';
}
}
if($interface == 'curl')
{
return $this->curlRequest($url, $get_variables, $post_variables, $headers);
}
elseif($interface == 'fopen')
{
return $this->fopenRequest($url, $get_variables, $post_variables, $headers);
}
else
{
throw new Exception('Invalid http interface defined. No such interface "' . gapi::http_interface . '"');
}
}
/**
* HTTP request using PHP CURL functions
* Requires curl library installed and configured for PHP
*
* @param Array $get_variables
* @param Array $post_variables
* @param Array $headers
*/
private function curlRequest($url, $get_variables=null, $post_variables=null, $headers=null)
{
$ch = curl_init();
if(is_array($get_variables))
{
$get_variables = '?' . str_replace('&amp;','&',urldecode(http_build_query($get_variables)));
}
else
{
$get_variables = null;
}
curl_setopt($ch, CURLOPT_URL, $url . $get_variables);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); //CURL doesn't like google's cert
if(is_array($post_variables))
{
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_variables);
}
if(is_array($headers))
{
curl_setopt($ch, CURLOPT_HTTPHEADER,$headers);
}
$response = curl_exec($ch);
$code = curl_getinfo($ch,CURLINFO_HTTP_CODE);
curl_close($ch);
return array('body'=>$response,'code'=>$code);
}
/**
* HTTP request using native PHP fopen function
* Requires PHP openSSL
*
* @param Array $get_variables
* @param Array $post_variables
* @param Array $headers
*/
private function fopenRequest($url, $get_variables=null, $post_variables=null, $headers=null)
{
$http_options = array('method'=>'GET','timeout'=>3);
if(is_array($headers))
{
$headers = implode("\r\n",$headers) . "\r\n";
}
else
{
$headers = '';
}
if(is_array($get_variables))
{
$get_variables = '?' . str_replace('&amp;','&',urldecode(http_build_query($get_variables)));
}
else
{
$get_variables = null;
}
if(is_array($post_variables))
{
$post_variables = str_replace('&amp;','&',urldecode(http_build_query($post_variables)));
$http_options['method'] = 'POST';
$headers = "Content-type: application/x-www-form-urlencoded\r\n" . "Content-Length: " . strlen($post_variables) . "\r\n" . $headers;
$http_options['header'] = $headers;
$http_options['content'] = $post_variables;
}
else
{
$post_variables = '';
$http_options['header'] = $headers;
}
$context = stream_context_create(array('http'=>$http_options));
$response = @file_get_contents($url . $get_variables, null, $context);
return array('body'=>$response!==false?$response:'Request failed, fopen provides no further information','code'=>$response!==false?'200':'400');
}
/**
* Case insensitive array_key_exists function, also returns
* matching key.
*
* @param String $key
* @param Array $search
* @return String Matching array key
*/
public static function array_key_exists_nc($key, $search)
{
if (array_key_exists($key, $search))
{
return $key;
}
if (!(is_string($key) && is_array($search)))
{
return false;
}
$key = strtolower($key);
foreach ($search as $k => $v)
{
if (strtolower($k) == $key)
{
return $k;
}
}
return false;
}
/**
* Get Results
*
* @return Array
*/
public function getResults()
{
if(is_array($this->results))
{
return $this->results;
}
else
{
return;
}
}
/**
* Get an array of the metrics and the matchning
* aggregate values for the current result
*
* @return Array
*/
public function getMetrics()
{
return $this->report_aggregate_metrics;
}
/**
* Call method to find a matching root parameter or
* aggregate metric to return
*
* @param $name String name of function called
* @return String
* @throws Exception if not a valid parameter or aggregate
* metric, or not a 'get' function
*/
public function __call($name,$parameters)
{
if(!preg_match('/^get/',$name))
{
throw new Exception('No such function "' . $name . '"');
}
$name = preg_replace('/^get/','',$name);
$parameter_key = gapi::array_key_exists_nc($name,$this->report_root_parameters);
if($parameter_key)
{
return $this->report_root_parameters[$parameter_key];
}
$aggregate_metric_key = gapi::array_key_exists_nc($name,$this->report_aggregate_metrics);
if($aggregate_metric_key)
{
return $this->report_aggregate_metrics[$aggregate_metric_key];
}
throw new Exception('No valid root parameter or aggregate metric called "' . $name . '"');
}
}
/**
* Class gapiAccountEntry
*
* Storage for individual gapi account entries
*
*/
class gapiAccountEntry
{
private $properties = array();
public function __construct($properties)
{
$this->properties = $properties;
}
/**
* toString function to return the name of the account
*
* @return String
*/
public function __toString()
{
if(isset($this->properties['title']))
{
return $this->properties['title'];
}
else
{
return;
}
}
/**
* Get an associative array of the properties
* and the matching values for the current result
*
* @return Array
*/
public function getProperties()
{
return $this->properties;
}
/**
* Call method to find a matching parameter to return
*
* @param $name String name of function called
* @return String
* @throws Exception if not a valid parameter, or not a 'get' function
*/
public function __call($name,$parameters)
{
if(!preg_match('/^get/',$name))
{
throw new Exception('No such function "' . $name . '"');
}
$name = preg_replace('/^get/','',$name);
$property_key = gapi::array_key_exists_nc($name,$this->properties);
if($property_key)
{
return $this->properties[$property_key];
}
throw new Exception('No valid property called "' . $name . '"');
}
}
/**
* Class gapiReportEntry
*
* Storage for individual gapi report entries
*
*/
class gapiReportEntry
{
private $metrics = array();
private $dimensions = array();
public function __construct($metrics,$dimesions)
{
$this->metrics = $metrics;
$this->dimensions = $dimesions;
}
/**
* toString function to return the name of the result
* this is a concatented string of the dimesions chosen
*
* For example:
* 'Firefox 3.0.10' from browser and browserVersion
*
* @return String
*/
public function __toString()
{
if(is_array($this->dimensions))
{
return implode(' ',$this->dimensions);
}
else
{
return '';
}
}
/**
* Get an associative array of the dimesions
* and the matching values for the current result
*
* @return Array
*/
public function getDimesions()
{
return $this->dimensions;
}
/**
* Get an array of the metrics and the matchning
* values for the current result
*
* @return Array
*/
public function getMetrics()
{
return $this->metrics;
}
/**
* Call method to find a matching metric or dimension to return
*
* @param $name String name of function called
* @return String
* @throws Exception if not a valid metric or dimensions, or not a 'get' function
*/
public function __call($name,$parameters)
{
if(!preg_match('/^get/',$name))
{
throw new Exception('No such function "' . $name . '"');
}
$name = preg_replace('/^get/','',$name);
$metric_key = gapi::array_key_exists_nc($name,$this->metrics);
if($metric_key)
{
return $this->metrics[$metric_key];
}
$dimension_key = gapi::array_key_exists_nc($name,$this->dimensions);
if($dimension_key)
{
return $this->dimensions[$dimension_key];
}
throw new Exception('No valid metric or dimesion called "' . $name . '"');
}
}
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