How to use php+ajax to load user login button

This article uses php ajax technology to achieve the loading effect of the login button. One is to improve the user experience, and the other is to avoid repeated submission of the form. Ajax determines whether the loading is completed. This article has certain reference value, and interested friends can refer to it.

Login form

1 <form onsubmit="return check_login()" style="text-align: center;margin-top:50px"> 
2     <input value="登 录"   class="btn_submit" id="btn_submit" type="submit"> 
3 </form>

Form submission button and button invalidation style

 1 .btn_submit { 
 2     background-color: #e31436; 
 3     color: #fff; 
 4     cursor: pointer; 
 5     display: inline-block; 
 6     font-size: 18px; 
 7     height: 44px; 
 8     line-height: 44px; 
 9     text-align: center; 
10     width: 200px; 
11     border-radius: 2px; 
12     border:none 
13 } 
14 .disabled{opacity: 0.5;cursor:default}

Related tutorials: ajax video tutorial

Form submission verification

 1 function check_login() { 
 2     if ($("#btn_submit").hasClass("disabled"));//避免重复提交  3     return false; 
 4     $("#btn_submit").addClass("disabled").val("正在提交"); 
 5     $.post("login.php", {id: 1}, function(data) { 
 6         $("#btn_submit").removeClass("disabled").val("登 录"); 
 7         location.href = "http://www.sucaihuo.com/php/2747.html"; 
 8     }, "json"); 
 9     return false; 
10 }

Related tutorials: PHP video tutorial

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