如何在ajax中调用函数并等待响应?

HTML :

HTML:

<a href="/profile.php?user={$username}&action_request="friend_request">
Friend request
</a>

PHP :

PHP:

if(isset($_GET['user']) && isset($_GET['action_request'])) {
     if(strcmp($_GET['action_request'],"friend_request") == 0) {
        insert_friendship($id_user1,$id_user2);
   }
}

and the function for insert is :

插入的函数是:

  //sql string
   if(sql_insert()) {
      return "Friendship request sent!";
      } else {
       return "Friendship request failed!"; }

P.S I am using smarty engine for templating.

P。我正在用智能引擎做模板。

How do i take the url from <a> tag with ajax and send it to the php page to call the function then ajax to wait for the respond and send it to the html.

如何使用ajax从标记获取url并将其发送到php页面以调用函数，然后使用ajax等待响应并将其发送到html。

2 个解决方案

#1

include jquery in your page.

在页面中包含jquery。

<script type="text/javascript">
    document.getElementById("ajax_a").addEventListner("click", function(e){
        e.preventDefault();
        var uri = document.getElementById("ajax_a").getAttribute("href");
        $.ajax({
            url: uri,
            type: "GET",
            data: {},
            dataType: "html",
            success: function(data){
                // data is the value returned by server.
            },
            error : function(){
                alert("some error occured");
                // data is the value returned by server.
            }
        });
    });
</script>

<a id="ajax_a" href="/profile.php?user={$username}&action_request="friend_request">
Friend request
</a>

#2

For using ajax you can use jQuery.ajax() http://api.jquery.com/jQuery.ajax/

要使用ajax，可以使用jQuery.ajax() http://api.jquery.com/jQuery.ajax/

And using ajax u will have to call the ajax function on click of the <a> tag and will have to specify the url on the ajax function.

使用ajax u必须在单击标记时调用ajax函数，并必须在ajax函数上指定url。

或

If you want to take the url from <a> tag with ajax and send it to the php page you will have to prevent the default click of the <a> tag using e.preventDefault(); and call ajax from using the url

如果您想使用ajax从标记获取url并将其发送到php页面，您必须防止使用e.preventDefault()默认单击标记;并通过url调用ajax

Try something like this and work around

试试这样的方法，然后尝试一下

$('selector').click(function(){
e.preventDefault();
var url = $(this).attr('href');
$.ajax({
  url: url,
  success: function(data) {
    //do something
  }
});
})

Call this function inside $(document).ready().

在$(document).ready()中调用此函数。

#1