php jquery 多文件上传简单实例

<div id="mulitplefileuploader">upload</div> 

<div id="status"></div> 
<script> 

$(document).ready(function() 
{ 

var settings = { 
    url: "upload.php", 
    method: "post", 
    allowedtypes:"jpg,png,gif,doc,pdf,zip", 
    filename: "myfile", 
    multiple: true, 
    onsuccess:function(files,data,xhr) 
    { 
        $("#status").html("<font color='green'>upload is success</font>"); 

    }, 
    onerror: function(files,status,errmsg) 
    {        
        $("#status").html("<font color='red'>upload is failed</font>"); 
    } 
} 
$("#mulitplefileuploader").uploadfile(settings); 

}); 
</script> 

<?php 
//if directory doesnot exists create it. 
$output_dir = "../upload"; 

if(isset($_files["myfile"])) 
{ 
    $ret = array(); 

    $error =$_files["myfile"]["error"]; 
   { 

        if(!is_array($_files["myfile"]['name'])) //single file 
        { 
            $filename = $_files["myfile"]["name"]; 
            move_uploaded_file($_files["myfile"]["tmp_name"],$output_dir. $_files["myfile"]["name"]); 
             //echo "<br> error: ".$_files["myfile"]["error"]; 

                 $ret[$filename]= $output_dir.$filename; 
        } 
        else 
        { 
                $filecount = count($_files["myfile"]['name']); 
              for($i=0; $i < $filecount; $i++) 
              { 
                $filename = $_files["myfile"]["name"][$i]; 
                 $ret[$filename]= $output_dir.$filename; 
                move_uploaded_file($_files["myfile"]["tmp_name"][$i],$output_dir.$filename ); 
              } 

        } 
    } 
    echo json_encode($ret); 

} 

?>