PHP+Ajax异步带进度条上传文件实例

2018-09-21 17:04

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　　最近项目中要做一个带进度条的上传文件的功能,学习了Ajax,使用起来比较方便,将几个方法实现就行。

　　前端引入文件

　　 <link rel=stylesheet href=

　　Ajax进度条异步处理

　　 <script type=text/javascript> $(function () { $(#myupload).ajaxForm({ dataType:json, beforeSend:function(){ $(.progress).show(); }, uploadProgress:function(event,position,total,percentComplete){ var percentVal = percentComplete + %; $(.progress-bar).width(percentComplete + %); $(.progress-bar).html(percentVal); $(.sr-only).html(percentComplete + %); }, success:function(data){ $(.progress).hide(); if(data.error == empty_name){ alert(文件上传非法,上传失败!); exit(); }; if(data.error == large){ alert(图片上传不能大于2M,上传失败!); exit(); }; /*alert(data.error);*/ if(data.error == format){ alert(图片格式错误,上传失败); //alert(data.type); exit(); }; //alert(上传成功(+data.size+k)</b> <span class=delimg rel=+data.pic+>删除</span>); $(.files).html(文件名: +data.name+<span class=delimg rel=+data.pic+> del </span>大小：+data.size); var img = 上传成功!); }, error:function(){ alert(图片上传失败); } }); $(.progress).hide(); }); </script>

　　前端上传HTML

　　 <div class=uk-container uk-container-center> <div class=pk-system-messages></div> <h1 class=uk-h2 uk-text-center style=margin-top:-100px;>文件上传</h1> <div class=pk-system-messages></div> <div class=container-main> <h1>Ajax Image Uploader</h1> <p>A simple tutorial to explain image uploading using jquery ajax and php</p> <form id=myupload action=new_upload.php method=post enctype=multipart/form-data> <label for=file>Filename:</label> <input type=file name=mypic id=file><br> <input type=submit name=upload class=btn btn-success value=upload> </form> <div class=progress> <div class=progress-bar progress-bar-success progress-bar-striped role=progressbar aria-valuenow=45 aria-valuemin=0 aria-valuemax=100 style=width: 0%> <span class=sr-only>0% Complete</span> </div> </div> <div class=files></div> <div class=showimg></div> </div> </div>

　　PHP文件上传类

　　 <?php class upload{ protected $file_path = files; //当前files存储文件夹 #protected $file_size = 1024000; protected $file_size = 5120000; //5M 用户上传 //检测文件是否为空 public function check_file($get_file) { if (empty($get_file)) { $type = check_file; $arr = array(error=>empty_name,type=>$type); echo json_encode($arr); exit(); } return true; } //检测文件类型 public function check_type($get_type) { if (( $get_type == .docx ) ( $get_type == .doc )) { #$types = $get_type; }else{ $type = check_type; $arr = array(error=>format,type=>$type); echo json_encode($arr); exit(); } return true; } //检测文件大小 public function check_size($get_file) { if ( $get_file != ) { if ( $get_file > $this->file_size ) { $arr = array(error=>large); echo json_encode($arr); exit(); } }else{ return false; exit(); } return true; } //文件保存 public function save_file($file_type,$file_tmp_name) { $rand = rand(1000, 9999); $pics = date(YmdHis) . $rand . $file_type; $path = $this->file_path./.$pics; $result = move_uploaded_file($file_tmp_name, $path); if($result){ return $pics; }else{ return false; exit(); } #return $pics; } } PHP文件上传处理 <?php include(upload.class.php); $up_obj = new upload(); $get_fileName = $_FILES[mypic][name]; $get_fileSize = $_FILES[mypic][size]; $get_TmpFiles = $_FILES[mypic][tmp_name]; $get_fileType = strstr($get_fileName, .); $check_result = $up_obj->check_file($get_fileName); if($check_result){ //检查文件类型 $result_type = $up_obj->check_type($get_fileType); //检查文件大小 if($result_type){ $result_size = $up_obj->check_size($get_fileSize); if($result_size){ //文件上传保存 $pics = $up_obj->save_file($get_fileType,$get_TmpFiles); $size = round($get_fileSize/1024,2); $arr = array( name => $get_fileName, pic => $pics, size=> $size, error => 2 ); //检查文件上传状态 if($pics){ echo json_encode($arr); /* 执行上传完成逻辑..... */ } } } }

　　文件上传效果如图：