php ZipArchive解压缩实现后台管理升级问题详解

            <form class="layui-form" lay-filter="component-form-group">
                <div class="layui-card">
                    <div class="layui-card-header contentTitle">系统升级</div>
                    <div class="layui-card-body">
                        <div class="layui-form-item">
                            <label for="zip_url" class="layui-form-label">程序包</label>
                            <div class="layui-inline"><input type="text" id="zip_url" name="zip_url" lay-verify="required" class="layui-input" readonly></div>
                            <div class="layui-inline layui-upload"><button type="button" class="layui-btn" id="uploadImg">上传压缩包</button></div>
                            <div class="layui-inline"> <a class="layui-btn" lay-filter="save" id="L_add" lay-submit="">确定升级</a></div>
                            <div class="layui-inline"><span class="x-red">*</span> 支持.zip、.rar、.gz格式压缩包</div>
                        </div>
                    </div>
                </div>
            </form>

 //上传压缩包；
        var loadingIndex;
        upload.render({
            elem: '#uploadImg'
            , url: '?m=Zip&a=zipDeal&act=upImg&token='+upToken
            , multiple: false
            , size: 102400
            , accept: 'file'
            , exts: 'zip|rar|gz'
            , number: 1
            , before: function (obj) {
                //console.log(obj);
                loadingIndex = layer.load();
            }
            , done: function (res) {
                layer.close(loadingIndex);
                if (res.code == 1) {
                    layer.msg(res.msg);
                }else{
                    $("#zip_url").val(res.imgUrl);
                }
            }
        });

 //读取信息;
    case "update";
        $zip_url = $_POST['zip_url'];
        //压缩包解压;
        if (extension_loaded("zip")) {
            $dest = "./";
            /*解压缩操作*/
            unzip($zip_url, $dest);
            unlink($zip_url);
            $res['code'] = "1";
            $res['msg'] = "解压完毕，目录已覆盖升级";
            die(json_encode_lockdata($res));
        } else {
            $res['code'] = "0";
            $res['msg'] = "请在php.ini中开启php_zip.dll";
            die(json_encode_lockdata($res));
        }
        break;

form.on('submit(save)', function () {
            $.ajax({
                type: "post",
                url: "?m=Zip&a=zipDeal&act=update",
                async: true,
                data: {
                    zip_url: $('#zip_url').val()
                },
                dataType: "json",
                success: function (res) {
                    if (res.code == 0) {
                        layer.msg(res.msg, {icon: 1,time: 2000});
                    } else {
                        layer.msg(res.msg, {icon: 1,time: 2000}, function () {
                            location.reload();
                        });
                    }
                }
            });
            return false;
        });

function unzip($zipName, $dest)
{
    //检测要解压压缩包是否存在
    if (!is_file($zipName)) {
        die("解压文件不存在，请确认压缩文件");
    }
    //检测目标路径是否存在
    if (!is_dir($dest)) {
        mkdir($dest, 0777, true);
    }
    $zip = new ZipArchive();
    if ($zip->open($zipName)) {
        $zip->extractTo($dest);
        $zip->close();
        return true;
    } else {
        return false;
    }
}