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Google login Api with php

How to create Google login

Step: 1 Go to this url
https://cloud.google.com/console

Step 2: Create a project






 Step 3: Enter the project name










 Step 4: Now on google+ api






Step 5: Now click on credentials and click on create new id






Step 6: Enter the redirect url


















 Now put this code in header

<?php
$response_type1 = "code";
$client_id1 = "38789626348.apps.googleusercontent.com";
$redirect_uri1 = "http://example.com/Homes/user_google_login";

$scope1 = "https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fuserinfo.email+https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fuserinfo.profile";
//$scope = "https://www.googleapis.com/auth/userinfo.profile";
$state1 = "access";
?>

<script type="text/javascript">
function student_google_login(){
window.open("https://accounts.google.com/o/oauth2/auth?response_type=<?php echo $response_type1;?>&client_id=<?php echo $client_id1;?>&redirect_uri=<?php echo $redirect_uri1;?>&scope=<?php echo $scope1;?>&state=<?php echo $state1;?>", height = 600, width = 400)
  }

</script>

 function user_google_login()
{
$this->autoRender = 'true';
$this->loadModel('EmailTemplate');

$client_id = "3874334626348.apps.googleusercontent.com";
$client_secret = "tQuWyTJnKyErRKMLUj4TcaY2Hw";

$redirect_uri="http://example.com/Homes/user_google_login";

if(!empty($_REQUEST['code'])){

$post = array(
    "grant_type" => "authorization_code",
    "code" => $_REQUEST['code'],
    "client_id" => $client_id,
    "client_secret" => $client_secret,
    "redirect_uri" => $redirect_uri
);
   $postText = http_build_query($post);

//echo "<pre>";print_r($postText); die;

$url = "https://accounts.google.com/o/oauth2/token";

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postText);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
$result = curl_exec($ch);
curl_close($ch);

$access_token1 = explode(":",$result);
$access_token2 = explode(",",$access_token1[1]);
$access_token = str_replace('"','',$access_token2[0]);
$access_token = str_replace("&nbsp;","",$access_token);

$getText = "";
$url1 = "https://www.googleapis.com/oauth2/v1/userinfo?access_token=".str_replace(" ","",trim($access_token));

$ch1 = curl_init();
curl_setopt($ch1,CURLOPT_URL, $url1);
curl_setopt($ch1, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch1, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch1, CURLOPT_SSL_VERIFYHOST, false);
$result111 = (string)curl_exec($ch1);
curl_close($ch1);
$gmail_details = str_replace("{","",$result111);

$gmail_details = str_replace("}","",$gmail_details);
$gmail_details = str_replace('"',"",$gmail_details);
$details = explode(',',$gmail_details);

$i=1;
foreach($details as $detail){
$aa = array();
$detail = str_replace("https://",'|||',$detail);
$aa = explode(':',$detail);
$gmail_details1[trim($aa[0])] = trim(str_replace("|||",'https://',trim($aa[1])));

}
}
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