PHP implements image selection, uploading to server and preview on WeChat applet

This article mainly introduces relevant information on WeChat applet image selection, uploading to the server, and preview (PHP) implementation examples. Friends in need can refer to

WeChat applet image selection, Upload to server, preview (PHP) implementation example

Mini program implements selecting pictures, previewing pictures, and uploading to the developer server

Tp3.2 image upload used in the background

The header reference when requesting can be removed (used for personal background verification permissions)

Mini program front-end code:

<view class="section">
 <form bindsubmit="bindFormSubmit">
  <textarea placeholder="请输入问题内容" name="content"/>
  <view class="">
   选择提问图片:  <label bindtap="checkimg">点击选择图片</label>
  </view>
  <view class="">
    <image wx:for="{{imglist}}" mode="aspectFit" bindtap="ylimg" src="{{item}}" style="width:75px;height:75px;" src="{{item}}"></image>
  </view>
  <button form-type="submit"> 提交 </button>
 </form>
</view>

Small program js code:

data: {
  imglist:[]
 },
/**
  * form提交事件
  */
 bindFormSubmit:function(e){
   self=this
   //图片
   var imglist = self.data.imglist
   //提问内容
   var content=e.detail.value.content;
   if(content==''){
    wx.showToast({
     title: '内容不能为空',
     icon: 'loading',
     duration: 1000,
     mask:true
    })
   }
   wx.showLoading({
    title: '正在提交...',
    mask:true
   })
   //添加问题
   wx.request({
    url: 'https://xxxxxxxxxx/index.PHP?g=user&m=center&a=createwt',
    data: {
     content:content
    },
    method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT
    header: app.globalData.header, // 设置请求的 header
    success: function (res) {
     // success
     if(typeof(res.data)=='number'){
      if (imglist != '') {
       //开始插入图片
       for(var i=0;i<imglist.length;i++){
        //上传至服务器
        wx.uploadFile({
         url: &#39;https://xxxxxxxx/index.php?g=user&m=center&a=upload&#39;, //仅为示例，非真实的接口地址
         filePath: imglist[0],
         name: &#39;files&#39;,
         formData: {
          &#39;wtid&#39;: res.data
         },
         header: app.globalData.header,
         success: function (res) {
          if(i>=imglist.length){
           self.setData({
            imglist:[]
           })
           wx.hideLoading();
           wx.showToast({
            title: &#39;提问成功&#39;,
            icon: &#39;success&#39;,
            duration: 2000,
            mask: true
           })
           wx.navigateBack({
            delta: 1
           })
          }
         }
        })
       }
       console.log(imglist);
      }else{
       wx.hideLoading();
       wx.showToast({
        title: &#39;提问成功&#39;,
        icon: &#39;success&#39;,
        duration: 2000,
        mask: true
       })
       wx.navigateBack({
        delta: 1
       })
      }
     }else{
      wx.hideLoading();
      wx.showToast({
       title: res.data,
       icon: &#39;loading&#39;,
       duration: 1000,
       mask: true
      })
     }
    },
    fail: function (res) {
     self.onLoad();
    }
   })
 },
 //点击选择图片
 checkimg:function(){
   console.log(&#39;点击选择图片&#39;);
   self=this
   wx.chooseImage({
    count: 9, // 默认9
    sizeType: [&#39;original&#39;, &#39;compressed&#39;], // 可以指定是原图还是压缩图，默认二者都有
    sourceType: [&#39;album&#39;, &#39;camera&#39;], // 可以指定来源是相册还是相机，默认二者都有
    success: function (res) {
     // 返回选定照片的本地文件路径列表，tempFilePath可以作为img标签的src属性显示图片
     var tempFilePaths = res.tempFilePaths
     self.setData({
      imglist:tempFilePaths
     })
    }
   })
 },
 //点击预览图片
 ylimg:function(e){
  wx.previewImage({
   current: e.target.dataset.src,
   urls: this.data.imglist // 需要预览的图片http链接列表
  })
 }

##php background code

//Picture Upload

public function upload(){
if(IS_POST){
$upload = new \Think\Upload();// 实例化上传类
$upload->maxSize  =   3145728 ;// 设置附件上传大小
$upload->exts   =   array('jpg', 'gif', 'png', 'jpeg');// 设置附件上传类型
$upload->rootPath =   './Uploads/'; // 设置附件上传根目录
$upload->savePath =   ''; // 设置附件上传（子）目录
// 上传文件 
$info  =  $upload->upload();
if(!$info) {// 上传错误提示错误信息
  $this->error($upload->getError());
}else{// 上传成功 获取上传文件信息
//插入到数据库中
}
}
}

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