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Jquery+AJAX上传文件，无刷新上传并重命名文件
TANKING的代码日志
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index.html

  1. <!DOCTYPE html>
  2. <html>
  3. <head>
  4.     <title>Ajax上传图片</title>
  5.     <meta charset="utf-8">
  6.     <script src="https://www.jq22.com/jquery/jquery-3.3.1.js"></script>
  7. </head>
  8. <body>
  9.     <h1>Ajax上传图片</h1>
  10.     <!-- 表单 -->
  11.     <form id="form" enctype="multipart/form-data">
  12.         <input type="file" id="fileAttach" name="file"/>
  13.         <input type="button" onclick="upload()" value="上传"/>
  14.     </form>
  16.     <!-- 显示结果 -->
  17.     <h2 id="upload-result"></h2>
  19.     <!-- 显示图片 -->
  20.     <div id="imgdiv"></div>
  22.     <!-- Ajax上传 -->
  23.     <script>
  24.         function upload(){
  25.             var form = new FormData(document.getElementById("form"));
  26.             $.ajax({
  27.                 url:"upload.php",
  28.                 type:"post",
  29.                 data:form,
  30.                 cache: false,
  31.                 processData: false,
  32.                 contentType: false,
  33.                 success:function(data){
  34.                     if (data.res == "400") {
  35.                         $("#upload-result").text("上传成功");
  36.                         $("#imgdiv").html("<img src=\"upload/"+data.path+"\"/>");
  37.                     }else if (data.res == "403") {
  38.                         $("#upload-result").text("格式不对");
  39.                     }else if (data.res == "404") {
  40.                         $("#upload-result").text("上传错误");
  41.                     }
  43.                 },
  44.                 error:function(data){
  45.                     alert("上传失败")
  46.                 }
  47.             })
  48.         }
  49.     </script>
  50. </body>
  51. </html>

upload.php

  1. <?php
  2. header("Content-type:application/json");
  4. //获取原始文件名
  5. $filename = $_FILES["file"]["name"];
  7. //获取文件后缀名
  8. $hzm = substr($filename,strpos($filename,"."));
  10. //设置新文件名
  11. $newfilename = substr(str_shuffle("QWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnm"),26,10);
  13. // 允许上传的图片后缀
  14. $allowedExts = array("gif", "jpeg", "jpg", "png");
  15. $temp = explode(".", $filename);
  16. $extension = end($temp);
  17. if ((($_FILES["file"]["type"] == "image/gif")
  18. || ($_FILES["file"]["type"] == "image/jpeg")
  19. || ($_FILES["file"]["type"] == "image/jpg")
  20. || ($_FILES["file"]["type"] == "image/pjpeg")
  21. || ($_FILES["file"]["type"] == "image/x-png")
  22. || ($_FILES["file"]["type"] == "image/png"))
  23. && ($_FILES["file"]["size"] < 2048000)   // 小于 2000 kb
  24. && in_array($extension, $allowedExts))
  25. {
  26.     if ($_FILES["file"]["error"] > 0)
  27.     {
  28.         echo "{\"res\":\"404\"}";
  29.     }
  30.     else
  31.     {
  32.     // 此处可以输出文件的详细信息
  33.     if (file_exists("upload/" . $newfilename.$hzm))
  34.         {
  35.             //
  36.         }
  37.         else
  38.         {
  39.             move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" . $newfilename.$hzm);
  40.             echo "{\"path\":\"$newfilename$hzm\",\"res\":\"400\"}";
  41.         }
  42.     }
  43. }
  44. else
  45. {
  46.     echo "{\"res\":\"403\"}";
  47. }
  48. ?>

请在当前目录建立upload文件夹用于存放上传后的图片

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Author

Name:TANKING
Date:2020-04-11
Web:LIKEYUNBA.COM
WeChat:face6009

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1 comments
相逢恨晚 2020-04-16 13:39:10
可以的，可以的
1 floor
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