<!-- 標(biāo)題 -->
<view class="title">小程序搜索</view>

<!-- 搜索框view -->
<view class="search_con">

<!-- 表單 -->
 <form bindsubmit="formSubmit">
 <!-- 記得設(shè)置name值，這樣JS才能接收name=keyword的值 -->
  <input type="text" name="keyword" class="search_input" placeholder='你要找什么呢？'/>
  <button formType="submit" class="search_btn">搜索</button>  
 </form>
</view>

<!-- 搜索結(jié)果展示 -->
<view wx:for="{{re}}" wx:key="re" class="search_result">
<!-- 當(dāng)提交空白表單的時(shí)候 -->
 <view class="empty">{{item.empty}}</view>
 <!-- 當(dāng)有搜索結(jié)果的時(shí)候 -->
 <view class="resname">{{item.resname}}</view>
 <!-- 當(dāng)查詢不到結(jié)果的時(shí)候 -->
 <view class="noresult">{{item.noresult}}</view>
</view>

const app = getApp()
Page({
 data: {},

 //執(zhí)行點(diǎn)擊事件
 formSubmit: function (e) {

  //聲明當(dāng)天執(zhí)行的
  var that = this;

  //獲取表單所有name=keyword的值
  var formData = e.detail.value.keyword;

  //顯示搜索中的提示
  wx.showLoading({
   title: '搜索中',
   icon: 'loading'
  })

  //向搜索后端服務(wù)器發(fā)起請(qǐng)求
  wx.request({

   //URL
   url: 'http://localhost/search.php?keyword=' + formData,

   //發(fā)送的數(shù)據(jù)
   data: formData,

   //請(qǐng)求的數(shù)據(jù)時(shí)JSON格式
   header: {
    'Content-Type':'application/json'
   },

   //請(qǐng)求成功
   success: function (res) {

    //控制臺(tái)打?。ㄩ_(kāi)發(fā)調(diào)試用）
    console.log(res.data)

    //把所有結(jié)果存進(jìn)一個(gè)名為re的數(shù)組
    that.setData({
     re: res.data,
    })

    //搜索成功后，隱藏搜索中的提示
    wx.hideLoading();
   }
  })
 },
})

/* 搜索樣式 */
.title{
 text-align: center;
 font-size: 20px;
 font-weight: bold;
}


.search_con{
 width: 80%;
 margin:20px auto;
}

.search_con .search_input{
 border: 1px solid rgb(214, 211, 211);
 height: 45px;
 border-radius: 100px;
 font-size: 17px;
 padding-left: 15px;/*此處要用padding-left才可以把光標(biāo)往右移動(dòng)15像素，不可以用text-indent*/
 color: #333;
}

.search_con .search_btn{
 margin-top: 15px;
 width: 100%;
 height: 45px;
 background: #56b273;
 color: #fff;
 border-radius: 100px;
}

.search_result{
 width: 80%;
 margin:10px auto;
}


.search_result .empty{
 text-align: center;
 color: #f00;
 font-size: 15px;
}

.search_result .noresult{
 text-align: center;
 color: #666;
 font-size: 15px;
}

.search_result .resname{
 text-align: left;
 color: #333;
 font-size: 15px;
}

<?php
header('Content-Type:application/json');

//獲取表單數(shù)據(jù)
$keyword1 = $_GET["keyword"];

//過(guò)濾表單空格
$keyword2 = trim($keyword1);

//當(dāng)表單提交空白數(shù)據(jù)時(shí)
if(empty($keyword2)){
  
  //構(gòu)建數(shù)組
  $arr = array(
      "empty" => "表單不能為空"
    );

  //把數(shù)組轉(zhuǎn)換為json
  $data = json_encode($arr);
  echo "[$data]";

}else{

//過(guò)濾表單特殊字符
$replace = array('!','@','#','$','%','^','&','*','(',')','_','-','+','=','{','}','[',']',';',':','"','<','>','?','/','|');
$keyword3 = str_replace($replace, '', $keyword2);

// 連接數(shù)據(jù)庫(kù)
$con = mysql_connect("數(shù)據(jù)庫(kù)地址","數(shù)據(jù)庫(kù)賬號(hào)","數(shù)據(jù)庫(kù)密碼");
if (!$con){die('Could not connect: ' . mysql_error());}

mysql_select_db("數(shù)據(jù)庫(kù)名", $con);
mysql_query("SET NAMES UTF8");

//查詢數(shù)據(jù)庫(kù)
$result = mysql_query("SELECT * FROM 表名 WHERE 需要查詢的字段 like '%$keyword3%' ORDER BY ID DESC");
$results = array();
//查詢數(shù)據(jù)庫(kù)是否存在這條記錄
$exist = mysql_num_rows($result);
if ($exist) {
  //遍歷輸出
  while ($row = mysql_fetch_assoc($result)){
    $results[] = $row;
    }

  //輸出JSON
  echo json_encode($results);

  //當(dāng)查詢無(wú)結(jié)果的時(shí)候
  }else{

    //構(gòu)建數(shù)組
    $arr = array(
      "noresult" => "暫無(wú)結(jié)果"
    );

    //把數(shù)組轉(zhuǎn)換為json
    $data = json_encode($arr);
    echo "[$data]";
}

//斷開(kāi)數(shù)據(jù)庫(kù)連接
mysql_close($con);
}
?>