Example code sharing for implementing the mood voting function in PHP

//cdn.bootcss.com/jquery/1.7.2/jquery.min.js

$.ajax({
  type: 'GET',
  url: 'mood.php',
  cache: false,
  data: 'id=1',
  dataType: 'json',
  error: function(){
    alert('出错了！');
  },
  success: function(json){
    if(json){
      $.each(json,function(index,array){
        var str = "<li><span>"+array[&#39;mood_val&#39;]+"</span><p class=\"pillar\" style=\"height:"+array[&#39;height&#39;]+"px;\"></p><p class=\"face\" rel=\""+array[&#39;mid&#39;]+"\"><img src=\"images/"+array[&#39;mood_pic&#39;]+"\"><br/>"+array[&#39;mood_name&#39;]+"</p></li>";
        $("#mood ul").append(str);
      });
    }
  }
});

$(".face").live('click',function(){
  var face = $(this);
  var mid = face.attr("rel");
  var value = face.parent().find("span").html();
  var val = parseInt(value)+1;
  $.post("mood.php?action=send",{moodid:mid,id:1},function(data){
    if(data>0){
      face.prev().css("height",data+"px");
      face.parent().find("span").html(val);
      face.find("img").addClass("selected");
    }else{
      alert(data);
    }
  });
});

include_once("sql.php");

$mname = explode(',',$moodname);//心情说明
$num = count($mname);
$mpic = explode(',',$moodpic);//心情图标
$id = (int)$_GET['id'];
$query = mysql_query("select * from mood where id=$id");
$rs = mysql_fetch_array($query);
if($rs){
  $total = $rs['mood0']+$rs['mood1']+$rs['mood2']+$rs['mood3']+$rs['mood4'];
  for($i=0;$i<$num;$i++){
    $field = &#39;mood&#39;.$i;
    $m_val = intval($rs[$field]);
    $height = 0; //柱图高度
    if($total && $m_val){
      $height=round(($m_val/$total)*$moodpicheight); //计算高度
    }
    $arr[] = array(
      &#39;mid&#39; => $i,
      &#39;mood_name&#39; => $mname[$i],
      &#39;mood_pic&#39; => $mpic[$i],
      &#39;mood_val&#39; => $m_val,
      &#39;height&#39; => $height
    );
  }
  echo json_encode($arr);
} else {
  for($i=0;$i<$num;$i++){
    $arr[] = array(
      &#39;mid&#39; => $i,
      &#39;mood_name&#39; => $mname[$i],
      &#39;mood_pic&#39; => $mpic[$i],
      &#39;mood_val&#39; => 0,
      &#39;height&#39; => 0
    );
  }
  echo json_encode($arr);
}

$id = (int)$_POST['id'];
$mid = (int)$_POST['moodid'];
if($mid<0 || !$id){
  echo "错误";
  exit;
}

$havemood = chk_mood($id);
if($havemood==1){
  echo "您已表达过了";exit;
}
$field = &#39;mood&#39;.$mid;
//查询是否有这个id
$result = mysql_query("select 1 from mood where id=&#39;{$id}&#39;");
$row = mysql_fetch_array($result);
if(is_array($row)){
  $query = mysql_query("update mood set ".$field."=".$field."+1 where id=".$id);
  if($query){
    setcookie("mood".$id, $mid.$id, time()+3600);
    $query2 = mysql_query("select * from mood where id=$id");
    $rs = mysql_fetch_array($query2);
    $total = $rs[&#39;mood0&#39;]+$rs[&#39;mood1&#39;]+$rs[&#39;mood2&#39;]+$rs[&#39;mood3&#39;]+$rs[&#39;mood4&#39;];
    $height = round(($rs[$field]/$total)*$moodpicheight);
    echo $height;
  }else{
    echo -1;
  }
} else {
  mysql_query("INSERT INTO mood(id,mood0,mood1,mood2,mood3,mood4)VALUES (&#39;{$id}&#39;,&#39;0&#39;,&#39;0&#39;,&#39;0&#39;,&#39;0&#39;,&#39;0&#39;)");
  $query = mysql_query("update mood set ".$field."=".$field."+1 where id=".$id);
  setcookie("mood".$id, $mid.$id, time()+3600);
  echo $moodpicheight;
}

$host="localhost";
$db_user="root";
$db_pass="";
$db_name="demo";
$timezone="Asia/Shanghai";

$link=mysql_connect($host,$db_user,$db_pass);
mysql_select_db($db_name,$link);
mysql_query("SET names UTF8");

header("Content-Type: text/html; charset=utf-8");

CREATE TABLE `mood` (
 `id` tinyint(5) NOT NULL,
 `mood0` int(9) unsigned NOT NULL,
 `mood1` int(9) unsigned NOT NULL,
 `mood2` int(9) unsigned NOT NULL,
 `mood3` int(9) unsigned NOT NULL,
 `mood4` int(9) unsigned NOT NULL,
 PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;