Detailed explanation of how PHP uses ajax to implement asynchronous uploading of files (pictures)-PHP Tutorial-php.cn

Detailed explanation of how PHP uses ajax to implement asynchronous uploading of files (pictures)

黄舟

Release： 2023-03-14 10:36:01

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这篇文章主要为大家详细介绍了php+ajax实现异步上传文件或图片功能，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

本文为大家分享了ajax异步上传文件或图片功能的具体代码，供大家参考，具体内容如下

//html代码

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//js代码

(':button').click(function(event) {
　　//formdata储存异步上传数据
 var formData = new FormData($('form')[0]);
 formData.append('file',$(':file')[0].files[0]);
 //坑点: 无论怎么传数据,console.log(formData)都会显示为空,但其实值是存在的,f12查看Net tab可以看到数据被上传了
 $.ajax({
  url:'formtest.php',
  type: 'POST',
  data: formData,
  //这两个设置项必填
  contentType: false,
  processData: false,
  success:function(data){
  console.log(data)
  var srcPath = data;
  console.log();
　　　　 //注意这里的路径要根据自己的储存文件的路径设置
  $('.picDis img').attr('src', '..'+srcPath);
  }
 })
 });

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php:

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点击上传图片并发送后, 可以看到页面上显示出图片, 查看本地文件夹可以看到文件也已储存到服务器.在客户端实现异步上传的关键在于FormData,关于这部分这里有详细介绍: FormData()

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