AJAX调用响应没有显示任何内容

I have this input field.

<input type="email" name="email"  required/>

When submit button is clicked, it goes into :

$(".store_email").click(function() 
{
    var ajax_url_store_email = "store_email.php";
    var value= document.getElementsByName('email')[0].value;


    $.post(ajax_url_store_email, {act:"Subscribe", value:value}, function(e){
      console.log(e);

    });
});

And the call is sent to:

$email=$_POST["value"];
 $verify= $link->query(" INSERT INTO `Subscribers_email`(`email`) VALUES ('$email') ");
        if($verify==true)
        {
            return json_encode( "Success!");
        }
        else
        {
         return json_encode("Something went wrong!");
        }

Everything is working fine, But this call is not returning anything. I mean the console.log(e); prints nothing, what could be the reason?

plus other answers you must set json dataType in $.post function if you want to return values as json :

$.post(ajax_url_store_email, {act:"Subscribe", value:value}, function(e){
  console.log(e);
},'json');

To return a response to the ajax request, you must echo not return:

if($verify==true){
    echo json_encode( "Success!");
}
else{
    echo json_encode("Something went wrong!");
}

try echo and exit instead of return

$verify= $link->query(" INSERT INTO `Subscribers_email`(`email`) VALUES ('$email') ");
        if($verify==true)
        {
            echo json_encode( "Success!");
        }
        else
        {
         echo json_encode("Something went wrong!");
        }
         exit;

You must use PHP print or echo function instead of return.