php创建多级目录方法

        创建目录在项目开发中经常会用到，记录下，直接上代码：

            <?php

                function create_dir($dirname){

                    //去除传入目录名称空格部分

                    $dirname = trim($dirname);

                    //判断传入的目录是否为空

                    if(empty($dirname)){

                        return '目录不能为空！';

                    }else{

                        //判断是否存在相同的目录名称

                        if(file_exits($dirname)){

                            return '已存在同名目录或文件！';

                        }else{

                            //开始创建目录并判断状态

                            if(mkdir($dirname, 0777, true)){

                                return '目录文件创建成功！';

                            }else{

                                return '目录文件创建失败！';

                            }

                        }

                    }                

                }