jQuery php ajax图片上传

jquery php ajax图片上传,上传后有预览,上传进度显示

上传文件和删除文件的处理都在action.php文件处理

演示

XML/HTML Code

<div class="demo">
        <p>允许上传gif/jpg/png格式的图片，图片体积不能超过500k
        </p>
        <div class="btn">
            <span>添加附件</span>
            <input id="fileupload" type="file" name="mypic">
        </div>
        <div class="progress">
            <span class="bar"></span><span class="percent">0%</span >
        </div>
        <div class="files"></div>
        <div id="showimg"></div>
   </div>

css文件

CSS Code

.btn{position: relative;overflow: hidden;margin-right: 4px;display:inline-block;*display:inline;padding:4px 10px 4px;font-size:14px;line-height:18px;*line-height:20px;color:#fff;text-align:center;vertical-align:middle;cursor:pointer;background-color:#5bb75b;border:1px solid #cccccc;border-color:#e6e6e6 #e6e6e6 #bfbfbf;border-bottom-color:#b3b3b3;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;}
.btn input {position: absolute;top: 0; rightright: 0;margin: 0;border: solid transparent;opacity: 0;filter:alpha(opacity=0); cursor: pointer;}
.progress { position:relative; margin-left:100px; margin-top:-24px; width:200px;padding: 1px; border-radius:3px; display:none}
.bar {background-color: green; display:block; width:0%; height:20px; border-radius: 3px; }
.percent { position:absolute; height:20px; display:inline-block; top:3px; left:2%; color:#fff }
.files{height:22px; line-height:22px; margin:10px 0}
.delimg{margin-left:20px; color:#090; cursor:pointer}

js文件

JavaScript Code

<script type="text/javascript">
$(function () {
    var bar = $('.bar');
    var percent = $('.percent');
    var showimg = $('#showimg');
    var progress = $(".progress");
    var files = $(".files");
    var btn = $(".btn span");
    $(".demo").wrap("<form id='myupload' action='action.php' method='post' enctype='multipart/form-data'></form>");
    $("#fileupload").change(function(){
        $("#myupload").ajaxSubmit({
            dataType:  'json',
            beforeSend: function() {
                showimg.empty();
                progress.show();
                var percentVal = '0%';
                bar.width(percentVal);
                percent.html(percentVal);
                btn.html("上传中...");
            },
            uploadProgress: function(event, position, total, percentComplete) {
                var percentVal = percentComplete + '%';
                bar.width(percentVal)
                percent.html(percentVal);
            },
            /*complete: function(xhr) {
                $(".files").html(xhr.responseText);
            },*/
            success: function(data) {
                files.html("<b>"+data.name+"("+data.size+"k)</b> <span class='delimg' rel='"+data.pic+"'>删除</span>");
                var img = "../upload/"+data.pic;
                showimg.html("<img src='"+img+"'>");
                btn.html("添加附件");
            },
            error:function(xhr){
                btn.html("上传失败");
                bar.width('0')
                files.html(xhr.responseText);
            }
        });
    });

    $(".delimg").live('click',function(){
        var pic = $(this).attr("rel");
        $.post("action.php?act=delimg",{imagename:pic},function(msg){
            if(msg==1){
                files.html("删除成功.");
                showimg.empty();
                progress.hide();
            }else{
                alert(msg);
            }
        });
    });
});
</script>

action.php

PHP Code

<?php
$action = $_GET['act'];
if($action=='delimg'){
    $filename = $_POST['imagename'];
    if(!emptyempty($filename)){
        unlink('../upload/'.$filename);
        echo '1';
    }else{
        echo '删除失败.';
    }
}else{
    $picname = $_FILES['mypic']['name'];
    $picsize = $_FILES['mypic']['size'];
    if ($picname != "") {
        if ($picsize > 1024000*30) {
            echo '图片大小不能超过30M';
            exit;
        }
        $type = strstr($picname, '.');
        if ($type != ".gif" && $type != ".jpg" && $type != ".png") {
            echo '图片格式不对！';
            exit;
        }
        $rand = rand(100, 999);
        $pics = date("YmdHis") . $rand . $type;
        //上传路径
        $pic_path = "../upload/". $pics;
        move_uploaded_file($_FILES['mypic']['tmp_name'], $pic_path);
    }
    $size = round($picsize/1024,2);
    $arr = array(
        'name'=>$picname,
        'pic'=>$pics,
        'size'=>$size
    );
    echo json_encode($arr);
}
?>

原文地址:http://www.freejs.net/article_biaodan_47.html