php+mysql+ajax点赞和踩的功能

嫌麻烦的也可以：点击下载

HTML:

  给力 {OVOV:$answer_datas.goods/}      不给力 {OVOV:$answer_datas.bads/}   

<?php $action=$_GET['action'];//获取get方式传过来的actionrequire_once("array/ovovsys_zan.php");switch($action){	case 'detail':		/*****赞开始****/		$zan_list = json_decode(str_replace("'",'"',$zan_json),true);		$zan_lists=array();		foreach($zan_list as $key=>$value){			if($value['uid']==$uid){		 		$zan_lists[]=$value['answer_id'];			}		} 		$smarty->assign('zan_list',$zan_lists);//查询当前登录的会员的uid对应的点赞的回答 		/*****赞结束****/ 		/*****踩开始****/		$cai_list = json_decode(str_replace("'",'"',$cai_json),true);		$cai_lists=array();		foreach($cai_list as $key=>$value){			if($value['uid']==$uid){		 		$cai_lists[]=$value['answer_id'];			}		} 		$smarty->assign('cai_list',$cai_lists);//查询当前登录的会员的uid对应的踩的回答 		/*****踩结束****/		$smarty->display('自己的静态页面');		exit();	break;}?>

ajax文件：

<?php require_once("array/ovovsys_zan.php");//这里引用array文件夹中的数组文件$action=trim($_GET['action']);if(empty($action)){	echo '参数错误！';exit();}switch($action){	 case 'zan'://点赞（给力）		//$zan_json是数组文件中设置的数组变量，存的是json数据----1		$zan_array = json_decode(str_replace("'",'"',$zan_json),true);				//获取当前的会员的uid-----2		$user_answer['uid']=$uid;		//获取对应的赞的回答的id----2		$user_answer['answer_id']=$_POST['answer_id'];				//将会员的uid和答案的id一块的数组放到指定的数组中----3		$zan_array[]=$user_answer;				$config_path = 'shuzu/ovovsys_zan.php';		if(!file_exists($config_path)){			$Base->ErrorMsg('文件错误：shuzu/ovovsys_zan.php 不存在！');exit();		}				//将指定的数组转换成json数据，并且将双引号转换成单引号，不然放到数组文件中后会出错----4		$zan_new_json = str_replace('"',"'",json_encode($zan_array));				$fp = @fopen($config_path,'r+');		if(!$content = @fread($fp,filesize($config_path))){			$Base->ErrorMsg('无法读取shuzu/ovovsys_zan.php文件！');exit();		}				//执行替换，将数组文件中对应的json数据----5		$content = str_replace("\$zan_json = \"{$zan_json}\"","\$zan_json = \"{$zan_new_json}\"",$content);		$fp = @fopen($config_path,'w+'); 		@fwrite($fp,$content); 				//修改对应的数据表中的数据----5		$Db->ThisQuery("update `".$db_prefix."ask_answers` set `goods`=`goods`+1 where `ans_id`=".$user_answer['answer_id']."");		exit();	break;	 case 'cai'://踩（不给力）		$cai_array = json_decode(str_replace("'",'"',$cai_json),true);		$user_answer['uid']=$uid;		$user_answer['answer_id']=$_POST['answer_id'];		$cai_array[]=$user_answer;		$config_path = 'shuzu/ovovsys_zan.php';		if(!file_exists($config_path)){			$Base->ErrorMsg('文件错误：shuzu/ovovsys_zan.php 不存在！');exit();		}		$cai_new_json = str_replace('"',"'",json_encode($cai_array));		$fp = @fopen($config_path,'r+');		if(!$content = @fread($fp,filesize($config_path))){			$Base->ErrorMsg('无法读取shuzu/ovovsys_zan.php文件！');exit();		}		$content = str_replace("\$cai_json = \"{$cai_json}\"","\$cai_json = \"{$cai_new_json}\"",$content);		$fp = @fopen($config_path,'w+'); 		@fwrite($fp,$content); 		$Db->ThisQuery("update `".$db_prefix."ask_answers` set `bads`=`bads`-1 where `ans_id`=".$user_answer['answer_id']."");		exit();	break;}?>

对应的数据文件（因为创建数据库时没有创建踩和赞的再断，所以这里就用php文件存变量的方式保存了一下答案对应的赞和踩的数据，其中包含用户的id和答案的id）

<?php $zan_json = "";$cai_json = "";?>你没看错，就是两个变量