Detailed explanation of steps to implement php+ajax file upload without refresh-PHP Tutorial-php.cn

Detailed explanation of steps to implement php+ajax file upload without refresh

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Release： 2023-03-26 16:50:02

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This time I will bring you php ajax without refreshFile uploaddetailed implementation steps, php ajax without refresh file uploadWhat are the precautions, the following is a practical case, one Get up and take a look.

Form format for file upload

<form id="uploadform" enctype="multipart/form-data" name="uploadform" method="post" >
    <input id="fileToUpload" type="file" name="fileToUpload" class="uploadinput" >
    <input id="add_file" type="button" value="提交">
</form>

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AjaxFileUpload achieves better asynchronous file upload effect and is easy to use:

 <!DOCTYPE html>
  <html>
    <head>
      <title></title>
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <script type="text/javascript" src="http://www.phpddt.com/usr/themes/dddefault/jquery-1.4.2.min.js"></script>
      <script type="text/javascript" src="ajaxfileupload.js"></script>
    </head>
  <script>
  jQuery(function(){  
   $("#buttonUpload").click(function(){   
     //加载图标  
     /* $("#loading").ajaxStart(function(){
      $(this).show();
     }).ajaxComplete(function(){
      $(this).hide();
     });*/
     //上传文件
    $.ajaxFileUpload({
      url:'upload.php',//处理图片脚本
      secureuri :false,
      fileElementId :'fileToUpload',//file控件id
      dataType : 'json',
      success : function (data, status){
        if(typeof(data.error) != 'undefined'){
          if(data.error != ''){
            alert(data.error);
          }else{
            alert(data.msg);
          }
        }
      },
      error: function(data, status, e){
        alert(e);
      }
  })
  return false;
   }) 
  })
  </script>
    <body>
      <input id="fileToUpload" type="file" size="20" name="fileToUpload" class="input">
      <button id="buttonUpload">上传</button>
    </body>
  </html>

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Upload can also pass parameters:

 var data = { name: 'my name', description: 'short description' } 
    $.ajaxFileUpload({
      url: 'upload.php',
      secureuri: false,
      data: data,
      fileElementId: 'fileToUpload',
      dataType: 'json',
      success: function (data) {
        alert(data.msg);
      },
      error: function (data) {
        alert("error");
      }
    });

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Main parameter description:

1. url represents the file path of processing file upload operation. You can test whether the URL can be directly accessed in the browser, as above: upload. php
2. fileElementId represents the file domain ID, as above: fileToUpload
3. Whether secureuri enables secure submission, the default is false
4. dataType data, generally choose json, the original ecology of javascript
5 、Processing function after successful submission
6、Error processing function for failed submission

Need to understand the relevant error prompts

1. SyntaxError: missing; before statement error

If this error occurs, you need to check whether the url path is accessible

2, SyntaxError: syntax error

If this error occurs, you need to check the PHP file that handles the submission operation Whether there is a syntax error

3. SyntaxError: invalid property id error

If this error occurs, you need to check whether the propertyID exists

4. SyntaxError: missing } in XML expression error

If this error occurs, you need to check whether the file domain name is consistent or does not exist

5.Other custom errors

You can use the variable $error to print directly to check whether each parameter is correct, which is much more convenient than the invalid error prompts above.

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!