下载文件总结
生成 HTTP 头强制下载数据到客户端，这在实现文件下载时很有用。
方法一：开启扩展情况下 //$file 文件路径 public function download_file($file){ if(is_file($file)){ $length = filesize($file); $type = mime_content_type($file); $showname = ltrim(strrchr($file,'/'),'/'); header("Content-Description: File Transfer"); header('Content-type: ' . $type); header('Content-Length:' . $length); if (preg_match('/MSIE/', $_SERVER['HTTP_USER_AGENT'])) { //for IE header('Content-Disposition: attachment; filename="' . rawurlencode($showname) . '"'); } else { header('Content-Disposition: attachment; filename="' . $showname . '"'); } readfile($file); } else { $this->error('源文件不存在！'); } }
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方法二，如果没有开启php_fileinfo.dll，谁让咱是没有服务器权限的程序员呢，又不能让人家看不起，唉！可能你会懂。 public function force_download($filename) { if ($filename == ''){ return FALSE; } if (FALSE === strpos($filename, '.')){ return FALSE; } $x = explode('.', $filename); $extension = end($x); $mimes =$this->getMimes();// Set a default mime if we can't find it if ( ! isset($mimes[$extension])){ $mime = 'application/octet-stream'; }else{ $mime = (is_array($mimes[$extension])) ? $mimes[$extension][0] : $mimes[$extension]; } // Generate the server headers if (strpos($_SERVER['HTTP_USER_AGENT'], "MSIE") !== FALSE) { header('Content-Type: "'.$mime.'"'); header('Content-Disposition: attachment; filename="'.$filename.'"'); header('Expires: 0'); header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); header("Content-Transfer-Encoding: binary"); header('Pragma: public'); header("Content-Length: ".filesize($filename)); } else { header('Content-Type: "'.$mime.'"'); header('Content-Disposition: attachment; filename="'.$filename.'"'); header("Content-Transfer-Encoding: binary"); header('Expires: 0'); header('Pragma: no-cache'); header("Content-Length: ".filesize($filename)); } readfile($filename); } private function getMimes(){ return $mimes = array( 'hqx' => 'application/mac-binhex40', 'cpt' => 'application/mac-compactpro', 'csv' => array('text/x-comma-separated-values', 'text/comma-separated-values', 'application/octet-stream', 'application/vnd.ms-excel', 'application/x-csv', 'text/x-csv', 'text/csv', 'application/csv', 'application/excel', 'application/vnd.msexcel'), 'bin' => 'application/macbinary', 'dms' => 'application/octet-stream', 'lha' => 'application/octet-stream', 'lzh' => 'application/octet-stream', 'exe' => array('application/octet-stream', 'application/x-msdownload'), 'class' => 'application/octet-stream', 'psd' => 'application/x-photoshop', 'so' => 'application/octet-stream', 'sea' => 'application/octet-stream', 'dll' => 'application/octet-stream', 'oda' => 'application/oda', 'pdf' => array('application/pdf', 'application/x-download'), 'ai' => 'application/postscript', 'eps' => 'application/postscript', 'ps' => 'application/postscript', 'smi' => 'application/smil', 'smil' => 'application/smil', 'mif' => 'application/vnd.mif', 'xls' => array('application/excel', 'application/vnd.ms-excel', 'application/msexcel'), 'ppt' => array('application/powerpoint', 'application/vnd.ms-powerpoint'), 'wbxml' => 'application/wbxml', 'wmlc' => 'application/wmlc', 'dcr' => 'application/x-director', 'dir' => 'application/x-director', 'dxr' => 'application/x-director', 'dvi' => 'application/x-dvi', 'gtar' => 'application/x-gtar', 'gz' => 'application/x-gzip', 'php' => 'application/x-httpd-php', 'php4' => 'application/x-httpd-php', 'php3' => 'application/x-httpd-php', 'phtml' => 'application/x-httpd-php', 'phps' => 'application/x-httpd-php-source', 'js' => 'application/x-javascript', 'swf' => 'application/x-shockwave-flash', 'sit' => 'application/x-stuffit', 'tar' => 'application/x-tar', 'tgz' => array('application/x-tar', 'application/x-gzip-compressed'), 'xhtml' => 'application/xhtml+xml', 'xht' => 'application/xhtml+xml', 'zip' => array('application/x-zip', 'application/zip', 'application/x-zip-compressed'), 'mid' => 'audio/midi', 'midi' => 'audio/midi', 'mpga' => '', 'mp2' => '', 'mp3' => array('', 'audio/mpg', '3', 'audio/mp3'), 'aif' => 'audio/x-aiff', 'aiff' => 'audio/x-aiff', 'aifc' => 'audio/x-aiff', 'ram' => 'audio/x-pn-realaudio', 'rm' => 'audio/x-pn-realaudio', 'rpm' => 'audio/x-pn-realaudio-plugin', 'ra' => 'audio/x-realaudio', 'rv' => 'video/vnd.rn-realvideo', 'wav' => array('audio/x-wav', 'audio/wave', 'audio/wav'), 'bmp' => array('image/bmp', 'image/x-windows-bmp'), 'gif' => 'image/gif', 'jpeg' => array('image/jpeg', 'image/pjpeg'), 'jpg' => array('image/jpeg', 'image/pjpeg'), 'jpe' => array('image/jpeg', 'image/pjpeg'), 'png' => array('image/png', 'image/x-png'), 'tiff' => 'image/tiff', 'tif' => 'image/tiff', 'css' => 'text/css', 'html' => 'text/html', 'htm' => 'text/html', 'shtml' => 'text/html', 'txt' => 'text/plain', 'text' => 'text/plain', 'log' => array('text/plain', 'text/x-log'), 'rtx' => 'text/richtext', 'rtf' => 'text/rtf', 'xml' => 'text/xml', 'xsl' => 'text/xml', 'mpeg' => 'video/mpeg', 'mpg' => 'video/mpeg', 'mpe' => 'video/mpeg', 'qt' => 'video/quicktime', 'mov' => 'video/quicktime', 'avi' => 'video/x-msvideo', 'movie' => 'video/x-sgi-movie', 'doc' => 'application/msword', 'docx' => array('application/vnd.openxmlformats-officedocument.wordprocessingml.document', 'application/zip'), 'xlsx' => array('application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', 'application/zip'), 'word' => array('application/msword', 'application/octet-stream'), 'xl' => 'application/excel', 'eml' => 'message/rfc822', 'json' => array('application/json', 'text/json') );
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看到这里估计大家都懂了，就是由后缀去匹配文件类型。实现mime_content_type的功能。
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