This article introduces a function that uses PHP to download files, which can support the downloading of files in multiple formats. Friends in need can refer to it.
PHP file download function sharing, the code is as follows: <?php /** * 文件下载函数举例 * func: down_file * param: $file * edit by bbs.it-home.org */ function down_file($file){ //First, see if the file exists if (!is_file($file)) { die("<b>404 File not found!</b>"); } //Gather relevent info about file $len = filesize($file); $filename = basename($file); $file_extension = strtolower(substr(strrchr($filename,"."),1)); //This will set the Content-Type to the appropriate setting for the file switch( $file_extension ) { case "pdf": $ctype="application/pdf"; break; case "exe": $ctype="application/octet-stream"; break; case "zip": $ctype="application/zip"; break; case "doc": $ctype="application/msword"; break; case "xls": $ctype="application/vnd.ms-excel"; break; case "ppt": $ctype="application/vnd.ms-powerpoint"; break; case "gif": $ctype="image/gif"; break; case "png": $ctype="image/png"; break; case "jpeg": case "jpg": $ctype="image/jpg"; break; case "mp3": $ctype="audio/mpeg"; break; case "wav": $ctype="audio/x-wav"; break; case "mpeg": case "mpg": case "mpe": $ctype="video/mpeg"; break; case "mov": $ctype="video/quicktime"; break; case "avi": $ctype="video/x-msvideo"; break; //The following are for extensions that shouldn't be downloaded (sensitive stuff, like php files) case "php": case "htm": case "html": case "txt": die("<b>Cannot be used for ". $file_extension ." files!</b>"); break; default: $ctype="application/force-download"; } //Begin writing headers header("Pragma: public"); header("Expires: 0"); header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); header("Cache-Control: public"); header("Content-Description: File Transfer"); //Use the switch-generated Content-Type header("Content-Type: $ctype"); //Force the download $header="Content-Disposition: attachment; filename=".$filename.";"; header($header ); header("Content-Transfer-Encoding: binary"); header("Content-Length: ".$len); @readfile($file); exit; } ?> Copy after login |