make url short php

This code is for make you url short through google API


<?php

// Declare the class
class GoogleUrlApi {

public $key=your key
// Constructor
function GoogleURLAPI($apiURL = 'https://www.googleapis.com/urlshortener/v1/url') {
// Keep the API Url

$this->apiURL = $apiURL.'?key='.$this->key;
}

// Shorten a URL
function shorten($url) {
// Send information along
$response = $this->send($url);
// Return the result
return isset($response['id']) ? $response['id'] : false;
}

// Expand a URL
function expand($url) {
// Send information along
$response = $this->send($url,false);
// Return the result
return isset($response['longUrl']) ? $response['longUrl'] : false;
}

// Send information to Google
function send($url,$shorten = true) {
// Create cURL
$ch = curl_init();
// If we're shortening a URL...
if($shorten) {
curl_setopt($ch,CURLOPT_URL,$this->apiURL);
curl_setopt($ch,CURLOPT_POST,1);
curl_setopt($ch,CURLOPT_POSTFIELDS,json_encode(array("longUrl"=>$url)));
curl_setopt($ch,CURLOPT_HTTPHEADER,array("Content-Type: application/json"));
}
else {
curl_setopt($ch,CURLOPT_URL,$this->apiURL.'&shortUrl='.$url);
}
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
// Execute the post
$result = curl_exec($ch);
// Close the connection
curl_close($ch);
// Return the result
return json_decode($result,true);
}
}



// Create instance with key
$key = 'AIzaSyDUtkDIQ6uK7GCE68Lji_eQE9lPlo3Lk5Q';
$googer = new GoogleURLAPI();

// Test: Shorten a URL
$shortDWName = $googer->shorten("http://americanentrepreneurship.com/nj/entrepreneurs-featured/university-entrepreneurial-activities-draw-alumni-involvement");
echo $shortDWName; // returns http://goo.gl/i002
echo "<br>";
// Test: Expand a URL
$longDWName = $googer->expand($shortDWName);
echo $longDWName; // returns https://davidwalsh.name


?>