得到文件的文件名 （不带扩展名）

 //得到文件的文件名,不带扩展名    public function getFileName($arrFileName)    {        $newFlieNames = array();        foreach($arrFileName as $key=>$value){            $houzhui = substr(strrchr($value, '.'), 1);            $newFlieNames[] = str_replace(".".$houzhui,'',$value);        }        //dd($newFlieNames);        return $newFlieNames;    }

应用：

         判断一个文件是否在该目录列表中

 //公司文件列表  目录遍历方法        $directories = "D:\wamp\dmp_line2\uploads\cmp_001";        $fileList = $this->listdir($directories);        $file = new File();        $fileList = $file->getFileName($fileList);        $postFileName = iconv("UTF-8","GB2312",$filename);        $postFileName = $file->getFileName(array($postFileName));        $postFileName = implode('',$postFileName);        $is_exits = in_array($postFileName,$fileList);        dd($is_exits);

 //遍历一层目录  (统计有多少个文件    public function listdir($dirname) {        $ds = opendir($dirname);        $filsList = array();        while($file = readdir($ds)) {            $path = $dirname.'/'.$file;            if(is_dir($file)) {                if($file != "." && $file != "..") {                    listdir($file);                }            }            else {                $filsList[] = $file;            }        }        return $filsList;    }

前台

<pre name="code" class="html">    <pre name="code" class="html"><script type="text/javascript">        function check(){            var textF = document.getElementById("textfield");            var filename = textF.value;  //取得上传文件名            var reg = /\.(?:csv|xls|xlsx)$/i;            //ajax请求判断文件夹内是存在该名称的文件，存在则给提示。注意此处要等后台的结果，所以用ajax同步            var comId = "{{$comp_id}}";            var is_exit = 0;            $.ajax({                type: 'post',                url: "{{url('query/is_FileExist')}}",                data: 'filename=' + filename+"&comId="+comId,                async: false,  //ajax同步                success: function (msg) {                    //alert(msg);                    if(msg == 1){                        alert("您上传的文件存在同名，请重新选择上传！");                        is_exit = 1;                    }                }            });            if(is_exit == 1){                return false;            }            //var filename=cur;            var index1=filename.lastIndexOf(".");            //alert(index1);            var index2=filename.length;            //alert(index2);            var postf=filename.substring(index1,index2);//后缀名            alert(postf);            if(reg.exec(postf)){                alert(" 上传成功")            }else{                alert(" 上传失败")                return false;            }            /*var textF = document.getElementById("textfield");            var cur = textF.value;            var reg = /(\.xls|\.xlsx|\.csv)/ig;            if(reg.test(cur)){                alert(" 上传成功")            }            else{                alert(" 上传失败")                return false;            }*/        }    </script></head>

FORM表单

<form method="POST" action="/public/query" enctype="multipart/form-data" id="act" onsubmit="return check()">