ajax实现上传文件

主要应用到FormData

html代码

<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js" charset="utf-8"></script>

<form id= "uploadForm">  
      <input type="file" name="file"/> 
      <input type="button" value="上传" onclick="doUpload()" />  
</form>  

    <script>
    
    function doUpload() {  
     var formData = new FormData($( "#uploadForm" )[0]);  
     $.ajax({  
          url: 'index.php?m=index&v=stockImport',  
          type: 'POST',  
          data: formData,  
          async: false,  
          cache: false,  
          contentType: false,  
          processData: false,  
          success: function (returndata) {  
              alert(returndata);  
          },  
          error: function (returndata) {  
              alert(returndata);  
          }  
     });  
}  
    
        </script>

PHP代码

$filename = $_FILES['file']['name'];
$tmp_name = $_FILES['file']['tmp_name'];
echo $filename.$tmp_name;