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thinkphp中ajax与php响应过程详解_PHP

May 12, 2018 am 09:16 AM
ajax php thinkphp response process

本文实例分析了thinkphp中ajax与php响应过程。分享给大家供大家参考。具体分析如下:

一般将前台页面搜索结果中,不喜欢的内容(链接),删除掉,因为整个网站的编程框架式thinkphp,运用js中的ajax对页面进行响应,调用后台php接口,实现前台和后台数据库的同时更新.

首先我们需要做的就是在前台页面中添加一个文本“删除”,可以这么添加:

代码如下:

<a href="javascript:void(0);" id= "<php>echo $val[id]</php>" class="delete" >删除</a>
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上面的html代码的意思:就是给删除添加一个href,这个href是个js函数,类似于超链接的作用,当然对于我这样的新手在刚开始的时候会有疑惑,我们平时的超链接不是这样的,网页中很多的javascript:void(0),那程序怎么知道用户点击删除后,会响应其真正对应的js函数呢?别急,这就是为什么会为删除添加id以及class这样的标签,相信我把js中的代码公布出来以后你就会明白了,代码如下:

代码如下:

jQuery(".list a.delete").click(function(){
            if(confirm("你确定要删除吗?")){
                var _this=this;
                var id = jQuery(_this).attr("id");
                jQuery.ajax({
                    url : &#39;/Search/index.php/Jason/delete?&#39;,
                    data : {&#39;id&#39;:id},
                    dataType : &#39;json&#39;,
                    success : function(data){
                        var del = data.del;
                        if(del == 1){//删除成功
                            jQuery("#"+id).parents(".list").remove();
                        }else{//删除失败
                            alert("删除失败");
                        }
                    }
                });
            }
});
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大家看函数的头部:jQuery(".list a.delete").click(),jQuery后面的标签是很重要的,这就保证了jquery很准确的响应页面中用户点击的“位置”,添加的事件为click(),在click里添加响应事件的代码:var id = jQuery(_this).attr("id");获取a对应的id,因为这个id是我们删除数据库时用到的链接id,当然这种直接明文的方式不好,在这里只是介绍整个响应过程。调用ajax,实现异步的运行整个过程。我们设置了js接受的是json串,这里的方式应该有很多种吧,我没有去尝试,大家要是有兴趣可以自行尝试一下。/Search/index.php/Jason/delete?这句话就是js去请求php的接口,php接口对用的代码如下:

注意ajax在求php接口时的路径,也就是delete函数必须放在JasonAction.class.php中,此例子是必须这样的:

代码如下:

public function delete(){  
        if($this->isGet()){  
            $userId = session("uid");//用户登录  
            if(!empty($userId)){  
                $a = M(&#39;***&#39;);  
                $id = $this->_get(&#39;id&#39;);  
                $result=$a->where("id=$id")->delete();//删除  
                if($result > 0){  
                    $arr = array("del"=>&#39;1&#39;);  
                }else{  
                    $arr = array("del"=>&#39;0&#39;);  
                }  
                $json_str = json_encode($arr);  
                echo $json_str;//返回给js  
            }  
        }  
}
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相信大家对上面的代码不会陌生吧,整个过程都是thinkphp框架内部配置完毕的.

var del = data.del;这句是接受php代码返回来的json串中del这个key的value,进而在前台进行页面更新和响应.

代码如下:

if(del == 1){//删除成功  
     jQuery("#"+id).parents(".list").remove();//这句话就是后台删除成功后,直接在前台对响应的p进行删除,这样性能就会很快,无需进行后台数据的重新提取至前台页面中,  
 }else{//删除失败  
     alert("删除失败");  
}
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整个响应的过程就是这样,至于效果优化,是优化和细化方面的问题,后来,身边的同事又告诉我前台移除响应链接的另一个动态效果:

即将:

代码如下:

jQuery("#"+id).parents(".list").remove();
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替换为:

代码如下:

jQuery("#"+id).parents(".list").slideUp("slow", function(){  
      jQuery(this).remove();  
});
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大家不妨试试效果,很不错的,好了,响应过程记载完毕,只是自己的个人见解和认知.

希望本文所述对大家基于ThinkPHP框架的PHP程序设计有所帮助。

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