一、上传文件:
1、 php.ini配置: 找到 File Uploads
file_uploads = On //打开上传文件的功能
upload_tmp_dir = 'd:/web/tmp' ; //上传文件的临时存储目录;取决于web服务器部署目录
upload_max_filesize 3M; //允许上传文件最大值,如若需要较大的值,则需先修改post方式的传输最大值
post_max_size =8M;
2、 .htaccess 配置
属性和值之间用空格‘ ’隔开非等号‘=’:
adddefaultcharset utf-8 //设置默认字符 php_value file_uploads On //打开上传功能 php_value post_max_size 6M // post提交的最大值 php_value upload_max_filesize 6M //允许上传的最大值
(一)上传单个文件:
html 表单:
<form action="upload.php" method="post" enctype="multipart/form-data"> <p><input type="file" name="ufile"></p> <p><input type="submit" name="submit" value="上传"></p> </form>
PHP接受处理上传文件
//主要为move_uploaed_file() 的运用 if (!empty($_POST)) { $dirName = "./".date("Y-m-d"); if (!is_dir($dirName)) { mkdir($dirName); //如无此目录则创建 } $suffix = strrchr($_FILES['ufile']['name'], '.');//截取文件的后缀名 $url = $dirName.'/'.uniqid().$suffix; //在日期的目录里以原来的后缀名以唯一性的文件名保存 $bool = move_uploaded_file($_FILES['ufile']['tmp_name'], $url); //从原来的临时文件移动到指定路径 if ($bool) { echo "上传成功!"; exit(); }else{ echo "上传失败!"; exit(); } }
(二)上传多个文件:
<form action="upload.php" method="post" enctype="multipart/form-data"> <p><input type="file" name="ufile[]" multiple=""></p> <p><input type="submit" name="submit" value="上传"></p> </form>
if(!empty($_POST)){ //创建保存目录 $dirName = "./".date('Y-m-d'); if (!is_dir($dirName)) { mkdir($dirName); } foreach ($_FILES['ufile']['tmp_name'] as $key => $value) { //取文件后缀 ($key与$_FILES['ufile']['name']数组的key一致) $suffix = strrchr($_FILES['ufile']['name'][$key],'.'); //生成前缀 $preffix = uniqid(); //保存路径 $url = $dirName."/".$preffix.$suffix; $bool = move_uploaded_file($value,$url); } if ($bool) { echo "上传成功!"; exit(); }else{ echo "上传失败!"; exit(); } }
二、下载文件
A. 当文件为浏览器不能识别的类型时,可直接用a标签实现下载 , 如:
<a href="../load/ay.xls">下载</a>
B.当文件为浏览器能识别的类型时,即如.html/.js/.css/.xml/.jpg/.jpeg等浏览器能解析直接打开的文件,可用header( ) 及file_get_contents( ) 实现,如:
<a href="download.php">下载</a>
$filename = "./load/5b0bd336b7980.jpg"; //提示浏览器为图片文件 header('Content-type: image/jpeg'); //Content-Disposition为内容处理方式,处理为附件,强制浏览器下载文件 header('Content-Disposition: attachment; filename='.$filename); //将整个文件读入一个字符串,即将二进制对象转为utf-8编码 echo file_get_contents($filename);
常见header( ) 响应头设置:
//定义编码 header( 'Content-Type:text/html;charset=utf-8 '); //文档语言 header('Content-language: en'); //CSS header('Content-type: text/css'); //Javascript header('Content-type: text/javascript'); //JPEG Image header('Content-type: image/jpeg'); //XML header('Content-type: text/xml'); //JSON header('Content-type: application/json'); //PDF header('Content-type: application/pdf'); //RSS header('Content-Type: application/rss+xml; charset=ISO-8859-1'); //Text (Plain) header('Content-type: text/plain'); //Atom header('Content-type: application/atom+xml'); //转到一个新地址 header('Location: http://www.example.org/'); // ok header('HTTP/1.1 200 OK'); //设置一个404头: header('HTTP/1.1 404 Not Found'); //设置地址被永久的重定向 header('HTTP/1.1 301 Moved Permanently'); //文件延迟转向: header('Refresh: 10; url=http://www.example.org/'); print 'You will be redirected in 10 seconds'; //当然,也可以使用html语法实现 // <meta http-equiv="refresh" content="10;http://www.example.org/ /> // override X-Powered-By: PHP: header('X-Powered-By: PHP/4.4.0'); header('X-Powered-By: Brain/0.6b'); //告诉浏览器最后一次修改时间 $time = time() - 60; // or filemtime($fn), etc header('Last-Modified: '.gmdate('D, d M Y H:i:s', $time).' GMT'); //告诉浏览器文档内容没有发生改变 header('HTTP/1.1 304 Not Modified'); //设置内容长度 header('Content-Length: 1234'); //设置为一个下载类型 header('Content-Type: application/octet-stream'); header('Content-Disposition: attachment; filename="example.zip"'); header('Content-Transfer-Encoding: binary'); // load the file to send: readfile('example.zip'); // 对当前文档禁用缓存 header('Cache-Control: no-cache, no-store, max-age=0, must-revalidate'); header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past header('Pragma: no-cache'); //设置内容类型: header('Content-Type: text/html; charset=iso-8859-1'); header('Content-Type: text/html; charset=utf-8'); header('Content-Type: text/plain'); //纯文本格式 header('Content-Type: image/jpeg'); //JPG*** header('Content-Type: application/zip'); // ZIP文件 header('Content-Type: application/pdf'); // PDF文件 header('Content-Type: audio/mpeg'); // 音频文件 header('Content-Type: application/x-shockw**e-flash'); //Flash动画 //显示登陆对话框 header('HTTP/1.1 401 Unauthorized'); header('WWW-Authenticate: Basic realm="Top Secret"'); print 'Text that will be displayed if the user hits cancel or '; print 'enters wrong login data';
//下载xlsx文件 $filename = rtrim($_SERVER['DOCUMENT_ROOT'],'/').'/app/files/payment_status.csv'; header('Content-Disposition: attachment; filename=payment_status.xlsx'); header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'); header('Content-Length: ' . filesize($filename)); header('Content-Transfer-Encoding: binary'); header('Cache-Control: must-revalidate'); header('Pragma: public'); readfile($filename);