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<?php
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if(isset($_GET['source'])) {
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    highlight_file(__FILE__);
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    die;
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}
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/*
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*
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* This script is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General public License for more details.
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*
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* This copyright notice MUST APPEAR in all copies of the script!
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*
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*  @author            CERDAN Yohann <cerdanyohann@yahoo.fr>
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*  @copyright      (c) 2009  CERDAN Yohann, All rights reserved
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*  @ version         12:38 04/08/2009
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*/
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class GoogleAnalyticsAPI
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{
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	/** Google account login (email) **/
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	private $login;
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	/** Google account password **/
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	private $password;
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	/** Google analytics website ID (avalaible on your google analytics account url) **/
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	private $ids;
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	/** The login token to the google analytics service **/
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	private $loginToken;
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	/** The XML response send by the service **/
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	private $response;
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	/** Begin date of the displaying datas **/
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	private $date_begin;
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	/** End date of the displaying datas **/
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	private $date_end;
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	/** Sort the results **/
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	private $sort;
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	/** The param to sort (metrics or dimensions) **/
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	private $sort_param;
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	/**
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          * Class constructor
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          *
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          * @param string $login the login (email)
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          * @param string $password the password
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          * @param string $ids the IDs of the website (find it in the google analytics gui)
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          * @param string $date_begin the begin date
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          * @param string $date_end the end date
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          *
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          * @return void
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          */
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	public function __construct($login,$password,$ids,$date_begin,$date_end = null)
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	{
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		$this->login = $login;
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		$this->password = $password;
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		$this->ids = $ids;
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		$this->date_begin = $date_begin;
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		if (!$date_end) {
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			$this->date_end = $date_begin;
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		} else {
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			$this->date_end = $date_end;
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		}
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		$this->sort = "-";
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		$this->sort_param = "metrics";
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		// Authentication
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		$this->login();
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	}
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	/**
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          * Set the result's sort by metrics
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          *
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          * @param boolean $sort asc or desc sort
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          *
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          * @return void
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          */
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	public function setSortByMetrics ($sort)
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	{
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		if ($sort==true) {
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			$this->sort = "";
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		} else {
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			$this->sort = "-";
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		}
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		$this->sort_param = 'metrics';
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	}
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	/**
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          * Set the result's sort by dimensions
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          *
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          * @param boolean $sort asc or desc sort
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          *
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          * @return void
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          */
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	public function setSortByDimensions ($sort)
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	{
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		if ($sort==true) {
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			$this->sort = "";
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		} else {
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			$this->sort = "-";
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		}
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		$this->sort_param = 'dimensions';
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	}
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	/**
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          * Set the IDs of the website
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          *
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          * @param string $ids the IDs of the website (find it in the google analytics gui)
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          *
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          * @return void
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          */
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	public function setIds($ids)
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	{
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		$this->ids = $ids;
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	}
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	/**
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          * Set the date of the export
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          *
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          * @param string $date_begin the begin date
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          * @param string $date_end the end date
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          *
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          * @return void
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          */
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	public function setDate ($date_begin,$date_end = null)
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	{
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		$this->date_begin = $date_begin;
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		if (!$date_end) {
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			$this->date_end = $date_begin;
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		} else {
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			$this->date_end = $date_end;
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		}
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	}
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	/**
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          * Login to the google server
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          * See : http://google-data-api.blogspot.com/2008/05/clientlogin-with-php-curl.html
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          *
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          * @return void
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          */
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	private function login()
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	{
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		$ch = curl_init();
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		curl_setopt($ch, CURLOPT_URL, "https://www.google.com/accounts/ClientLogin");
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		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
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		$data = array('accountType' => 'GOOGLE',
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				  'Email' => $this->login,
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				  'Passwd' => $this->password,
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				  'source'=>'php_curl_analytics',
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				  'service'=>'analytics');
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		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
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		curl_setopt($ch, CURLOPT_POST, true);
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		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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		curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
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		$hasil = curl_exec($ch);
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		curl_close($ch);
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		// Get the login token
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		// SID=DQA...oUE
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		// LSID=DQA...bbo
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		// Auth=DQA...Sxq
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		if (preg_match('/Auth=(.*)$/',$hasil,$matches)>0) {
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			$this->loginToken = $matches[1];
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		} else {
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			trigger_error('Authentication problem',E_USER_WARNING);
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			return null;
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		}
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	}
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	/**
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           * Get URL content using cURL.
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          *
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          * @param string $url the url
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          *
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          * @return string the html code
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          */
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	function getContent ($url)
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	{
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		if (!extension_loaded('curl')) {
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            throw new Exception('curl extension is not available');
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        }
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		$ch = curl_init($url);
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		$header[] = 'Authorization: GoogleLogin auth=' . $this->loginToken;
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		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
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		curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
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		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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		curl_setopt($ch, CURLOPT_HEADER, false);
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		$this->response = curl_exec($ch);
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		$infos = curl_getinfo($ch);
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		curl_close($ch);
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		return $infos['http_code'];
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	}
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	/**
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          * Get the google analytics datas by dimensions and metrics
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          * See : http://code.google.com/intl/fr/apis/analytics/docs/gdata/gdataReferenceDimensionsMetrics.html
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          *
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          * @param string $metrics the metrics
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          * @param string $dimensions the dimensions
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          *
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          * @return array
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          */
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	public function getDimensionByMetric($metrics, $dimensions)
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	{
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		$url = "https://www.google.com/analytics/feeds/data?ids=ga:" . $this->ids . "&metrics=ga:" . $metrics . "&dimensions=ga:" . $dimensions . "&start-date=" . $this->date_begin . "&end-date=" . $this->date_end ."&sort=" . $this->sort . "ga:";
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		if ($this->sort_param=='metrics') { // sort by metrics
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			$url .= $metrics;
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		}
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		if ($this->sort_param=='dimensions') { // sort by dimensions
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			$url .= $dimensions;
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		}
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		if($this->getContent($url) == 200) {
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			$XML_object = simplexml_load_string($this->response);
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			$labels_array = array();
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			$datas_array = array();
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			foreach($XML_object->entry as $m) {
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				$dxp = $m->children('http://schemas.google.com/analytics/2009');
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				$metric_att = $dxp->metric->attributes();
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				$dimension_att = $dxp->dimension->attributes();
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				$labels_array []= $dimension_att['value'] . ' (' . $metric_att['value'] . ')';
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				$datas_array  []= (string)$metric_att['value'];
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			}
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			return array('labels' => $labels_array, 'datas' => $datas_array);
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		} else {
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			return null;
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		}
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	}
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	/**
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          * Get the google analytics datas by metrics
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          * See : http://code.google.com/intl/fr/apis/analytics/docs/gdata/gdataReferenceDimensionsMetrics.html
265
          *
266
          * @param string $metrics the metrics
267
          * @param string $uri the url of the website page (ex : /myurl/)
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          *
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          * @return array
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          */
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272
	public function getMetric($metric,$uri=null)
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	{
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		$url = "https://www.google.com/analytics/feeds/data?ids=ga:" . $this->ids . "&metrics=ga:" . $metric . "&start-date=" . $this->date_begin . "&end-date=" . $this->date_end;
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276
		if ($uri) {
277
			$url .= "&dimensions=ga:pagePath&filters=ga:pagePath%3D%3D" . $uri;
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		}
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280
		if($this->getContent($url) == 200) {
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			$XML_object = simplexml_load_string($this->response);
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			$dxp = $XML_object->entry->children('http://schemas.google.com/analytics/2009');
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			if (@count($dxp)>0) {
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				$metric_att = $dxp->metric->attributes();
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			}
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			return $metric_att['value'] ? (string)$metric_att['value'] : 0;
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		} else {
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			return null;
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		}
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	}
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}
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?>