大名做网站,长春搜索引擎网站推广,收费网站建设视频教程免费下载,秦皇岛在建工程项目php让图片可以下载的方法发布于 2014-10-04 11:16:18 | 102 次阅读 | 评论: 0 | 来源: 网友投递PHP开源脚本语言PHP(外文名: Hypertext Preprocessor#xff0c;中文名#xff1a;“超文本预处理器”)是一种通用开源脚本语言。语法吸收了C语言、Java和Perl的特点#xff0c;…php让图片可以下载的方法发布于 2014-10-04 11:16:18 | 102 次阅读 | 评论: 0 | 来源: 网友投递PHP开源脚本语言PHP(外文名: Hypertext Preprocessor中文名“超文本预处理器”)是一种通用开源脚本语言。语法吸收了C语言、Java和Perl的特点入门门槛较低易于学习使用广泛主要适用于Web开发领域。PHP的文件后缀名为php。本文是一个php实现的可以让图片也能像附件一样下载代码感兴趣的同学参考下.// 文件目录define(‘DL_DIR, ‘temp/);// 常见扩展名所对应的MIME类型$MIMETypes array(‘ez ‘application/andrew-inset,‘hqx ‘application/mac-binhex40′,‘cpt ‘application/mac-compactpro,‘doc ‘application/msword,‘bin ‘application/octet-stream,‘dms ‘application/octet-stream,‘lha ‘application/octet-stream,‘lzh ‘application/octet-stream,‘exe ‘application/octet-stream,‘class ‘application/octet-stream,so ‘application/octet-stream,‘dll ‘application/octet-stream,‘oda ‘application/oda,‘pdf ‘application/pdf,‘ai ‘application/postscrīpt,‘eps ‘application/postscrīpt,‘ps ‘application/postscrīpt,smi ‘application/smil,smil ‘application/smil,‘mif ‘application/vnd.mif,‘xls ‘application/vnd.ms-excel,‘ppt ‘application/vnd.ms-powerpoint,‘wbxml ‘application/vnd.wap.wbxml,‘wmlc ‘application/vnd.wap.wmlc,‘wmlsc ‘application/vnd.wap.wmlscrīptc,‘bcpio ‘application/x-bcpio,‘vcd ‘application/x-cdlink,‘pgn ‘application/x-chess-pgn,‘cpio ‘application/x-cpio,‘csh ‘application/x-csh,‘dcr ‘application/x-director,‘dir ‘application/x-director,‘dxr ‘application/x-director,‘dvi ‘application/x-dvi,spl ‘application/x-futuresplash,‘gtar ‘application/x-gtar,‘hdf ‘application/x-hdf,‘js ‘application/x-javascrīpt,skp ‘application/x-koan,skd ‘application/x-koan,skt ‘application/x-koan,skm ‘application/x-koan,‘latex ‘application/x-latex,‘nc ‘application/x-netcdf,‘cdf ‘application/x-netcdf,sh ‘application/x-sh,shar ‘application/x-shar,swf ‘application/x-shockwave-flash,sit ‘application/x-stuffit,sv4cpio ‘application/x-sv4cpio,sv4crc ‘application/x-sv4crc,‘tar ‘application/x-tar,‘tcl ‘application/x-tcl,‘tex ‘application/x-tex,‘texinfo ‘application/x-texinfo,‘texi ‘application/x-texinfo,‘t ‘application/x-troff,‘tr ‘application/x-troff,‘roff ‘application/x-troff,‘man ‘application/x-troff-man,‘me ‘application/x-troff-me,‘ms ‘application/x-troff-ms,‘ustar ‘application/x-ustar,src ‘application/x-wais-source,‘xhtml ‘application/xhtmlxml,‘xht ‘application/xhtmlxml,‘zip ‘application/zip,‘au ‘audio/basic,snd ‘audio/basic,‘mid ‘audio/midi,‘midi ‘audio/midi,‘kar ‘audio/midi,‘mpga ‘audio/mpeg,‘mp2′ ‘audio/mpeg,‘mp3′ ‘audio/mpeg,‘aif ‘audio/x-aiff,‘aiff ‘audio/x-aiff,‘aifc ‘audio/x-aiff,‘m3u ‘audio/x-mpegurl,‘ram ‘audio/x-pn-realaudio,‘rm ‘audio/x-pn-realaudio,‘rpm ‘audio/x-pn-realaudio-plugin,‘ra ‘audio/x-realaudio,‘wav ‘audio/x-wav,‘pdb ‘chemical/x-pdb,‘xyz ‘chemical/x-xyz,‘bmp ‘image/bmp,‘gif ‘image/gif,‘ief ‘image/ief,‘jpeg ‘image/jpeg,‘jpg ‘image/jpeg,‘jpe ‘image/jpeg,‘png ‘image/png,‘tiff ‘image/tiff,‘tif ‘image/tiff,‘djvu ‘image/vnd.djvu,‘djv ‘image/vnd.djvu,‘wbmp ‘image/vnd.wap.wbmp,‘ras ‘image/x-cmu-raster,‘pnm ‘image/x-portable-anymap,‘pbm ‘image/x-portable-bitmap,‘pgm ‘image/x-portable-graymap,‘ppm ‘image/x-portable-pixmap,‘rgb ‘image/x-rgb,‘xbm ‘image/x-xbitmap,‘xpm ‘image/x-xpixmap,‘xwd ‘image/x-xwindowdump,‘igs ‘model/iges,‘iges ‘model/iges,‘msh ‘model/mesh,‘mesh ‘model/mesh,silo ‘model/mesh,‘wrl ‘model/vrml,‘vrml ‘model/vrml,‘css ‘text/css,‘html ‘text/html,‘htm ‘text/html,‘asc ‘text/plain,‘txt ‘text/plain,‘rtx ‘text/richtext,‘rtf ‘text/rtf,sgml ‘text/sgml,sgm ‘text/sgml,‘tsv ‘text/tab-separated-values,‘wml ‘text/vnd.wap.wml,‘wmls ‘text/vnd.wap.wmlscrīpt,‘etx ‘text/x-setext,‘xsl ‘text/xml,‘xml ‘text/xml,‘mpeg ‘video/mpeg,‘mpg ‘video/mpeg,‘mpe ‘video/mpeg,‘qt ‘video/quicktime,‘mov ‘video/quicktime,‘mxu ‘video/vnd.mpegurl,‘avi ‘video/x-msvideo,‘movie ‘video/x-sgi-movie,‘ice ‘x-conference/x-cooltalk,);?让图片也能像附件一样的下载不多说了。请看下面的程序// 安全性过滤$fileName basename($_SERVER[QUERY_STRING]);$filePath dirname(__FILE__) . ‘/ . DL_DIR . $fileName;/*简述: DIRECTORY_SEPARATOR(目录界定符, 目录函数库预定义常量)来源: Directory 目录函数(PHP手册-函数参考-Directories节点)说明: windows系统下为反斜杠, Linux系统下为/,windows下两个都正常用, linux就不知道了, 为了标准, 显得专业点, 嘿嘿.*/$filePath str_replace(array(‘/, ‘\), DIRECTORY_SEPARATOR, $filePath);if(!is_file($filePath)) {exit(‘File: . $fileName . ‘ not exists!);} else { // 如果是一个有效的文件// 文件扩展名$fileExt substr(strrchr($fileName, ‘.), 1);// 文件类型$fileType $MIMETypes[$fileExt] ? $MIMETypes[$fileExt] : ‘application/octet-stream;// 是否是图片$isImage False;/*简述: getimagesize(), 详见手册说明: 判定某个文件是否为图片的有效手段, 常用在文件上传验证*/$imgInfo getimagesize($filePath);if ($imgInfo[2] $imgInfo[bits]) {$isImage True;}// 显示方式$attachment $isImage ? ‘inline : ‘attachment;// 读取文件if (is_readable($filePath)) {/*简述: ob_end_clean() 清空并关闭输出缓冲, 详见手册说明: 关闭输出缓冲, 使文件片段内容读取至内存后即被送出, 减少资源消耗*/ob_end_clean();/*HTTP头信息: 指示客户机可以接收生存期不大于指定时间(秒)的响应*/header(‘Cache-control: max-age31536000′);/*HTTP头信息: 缓存文件过期时间(格林威治标准时)*/header(‘Expires: . gmdate(‘D, d M Y H:i:s, time()31536000) . ‘ GMT);/*HTTP头信息: 文件在服务期端最后被修改的时间Cache-control,Expires,Last-Modified 都是控制浏览器缓存的头信息在一些访问量巨大的门户, 合理的设置缓存能够避免过多的服务器请求, 一定程度下缓解服务器的压力*/header(‘Last-Modified: . gmdate(‘D, d M Y H:i:s , filemtime($filePath) . ‘ GMT));/*HTTP头信息: 文档的编码(Encode)方法, 因为附件请求的文件多样化, 改变编码方式有可能损坏文件, 故为none*/header(‘Content-Encoding: none);/*HTTP头信息: 告诉浏览器当前请求的文件类型.1.始终指定为application/octet-stream, 就代表文件是二进制流, 始终提示下载.2.指定对应的类型, 如请求的是mp3文件, 对应的MIME类型是audio/mpeg, IE就会自动启动Windows Media Player进行播放.*/header(‘Content-type: . $fileType);/*HTTP头信息: 如果为attachment, 则告诉浏览器, 在访问时弹出”文件下载”对话框, 并指定保存时文件的默认名称(可以与服务器的文件名不同)如果要让浏览器直接显示内容, 则要指定为inline, 如图片, 文本*/header(‘Content-Disposition: . $attachment . ‘; filename . $fileName);/*HTTP头信息: 告诉浏览器文件长度(IE下载文件的时候不是有文件大小信息么?)*/header(‘Content-Length: . filesize($filePath));// 打开文件(二进制只读模式)$fp fopen($filePath, ‘rb);// 输出文件fpassthru($fp);// 关闭文件fclose($fp);exit();} else {exit(‘Read file failed!);}}?相关阅读:php让图片可以下载的方法php简单实现文件或图片强制下载的方法php旋转图片90度的方法示例代码PHP生成图片缩略图的方法详解php实现文件强制下载的方法php实现简单文件下载的方法php生成图片缩略图的方法php检测图片主要颜色的方法PHP实现图片自动清理的方法两种php实现图片上传的方法php生成图片验证码的方法php实现图片缩略图的方法
