diff --git a/Source/src/app.php b/Source/src/app.php
index eddb7d9..6baf57a 100644
--- a/Source/src/app.php
+++ b/Source/src/app.php
@@ -295,9 +295,11 @@ function loginRegister($default){
         "title"     =>  ucfirst($default),
         "description" => "Start now in CodeShare",
         "page"      =>  $default,
-        "state"     =>  0, //0=no logged, 1 login fail, 2 register fail, 3 all correct (render home)
+        "state"     =>  0, //0=no logged, 1 login fail, 2 register fail, 3 all correct (render home), 4 captcha failed
     );
 
+    $response = checkCaptcha($_POST['g-recaptcha-response']);
+
     if(array_key_exists('email',$_POST) or array_key_exists('emailre',$_POST)){
         if($_POST["email"]){
             $bool=checklogin($_POST['email'],$_POST['pwd']);
@@ -312,6 +314,8 @@ function loginRegister($default){
         }
     }
 
+    if($response)
+
     if($bool) {
         header("Location: index.php");
     }else
diff --git a/Source/src/functions.php b/Source/src/functions.php
index 4a6d4cb..f00ce41 100644
--- a/Source/src/functions.php
+++ b/Source/src/functions.php
@@ -77,4 +77,19 @@ function groupByCategory(&$supported){
         array_push($grouped[$val[1]][0],[$key,$val[0]]);
     }
     return $grouped;
+}
+
+function checkCaptcha($response){
+    $url = "https://www.google.com/recaptcha/api/siteverify";
+    $post = 'secret='.'6Lc7gXAUAAAAAOTbo2u3IXoSB6KlhtVmUHTzpcGY&response='. $response;
+
+    $ch = curl_init( $url );
+    curl_setopt( $ch, CURLOPT_POST, 1);
+    curl_setopt( $ch, CURLOPT_POSTFIELDS, $post);
+    curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, 1);
+    curl_setopt( $ch, CURLOPT_HEADER, 0);
+    curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1);
+
+    $response = curl_exec( $ch );
+    return json_decode($response)["success"];
 }
\ No newline at end of file