javascript - PHP query execute without error but return count 0 -

i creating login in angularjs, in login.phppage verify whether user exist or not number of rows exist or not means using rowcount() in php pdo return 0 result. here php file:

<?php    /*    * collect details angular http request.    */      $postdata = file_get_contents("php://input");     $request = json_decode($postdata);     $email = $request->email;     $pass = $request->password;        $user ="root"; $pass ="m2n1shlko";  $dbh = new pdo('mysql:host=localhost;dbname=blog_db', $user, $pass);  $query = $dbh->prepare("select * `signup_tbl` `email`='$email' , `password`='$pass'"); $query->execute(); $count = $query->rowcount(); if($count>0){  echo "you have sucessfully login email: ".$count; //this go under "data" of angular call.  }else{     echo "error while authentication email: " .$count; }       /*      * can use $email , $pass further work. such database calls.     */     ?> 

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data controller here didn't know missing code. apreciate if .. thanks

its $query->rowcount(); not $query->rowcount();

 $count = $query->rowcount();  if($count>0){  echo "you have sucessfully login email: ".$count; //this go under "data" of angular call.  }else{  echo "error while authentication email: " .$count;  } 

read manual rowcount