文件有时下载为.PHP而不是.PDF？ [英] Files sometimes download as .PHP instead of .PDF?

问题描述

我正在使用一个脚本，允许用户下载在线存储的文件。它似乎与图像文件一起使用，但是使用PDF浏览器有时会下载.PHP文件而不是.PDF文件。

I'm working on a script that allows users to download files stored online. It always seems to work with image files, but with PDF's the browser sometimes downloads .PHP files instead of .PDF's.

我没有使用任何其他文件类型测试脚本，所以我不知道问题是否限于PDF，或者是否会发生其他类型的好。

I haven't tested the script with any other file types, so I don't know if the problem is limited to PDF's or if it would happen for other types as well.

这是我的代码：

$mimeTypes = array(
    /* images */
    'png' => 'image/png', 'jpeg' => 'image/jpeg', 'jpg' => 'image/jpeg', 'gif' => 'image/gif', 'bmp' => 'image/bmp',
    /* spreadsheets */
    'xl' => 'application/vnd.ms-excel', 'xls' => 'application/vnd.ms-excel', 'xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', 'csv' => 'text/csv', 'sdc' => 'application/vnd.stardivision.calc', 'odc' => 'application/vnd.oasis.opendocument.chart',
    /* text files */
    'doc' => 'application/msword', 'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document', 'odt' => 'application/vnd.oasis.opendocument.text', 'rtf' => 'application/rtf', 'rtx' => 'text/richtext',
    /* PDF */
    'pdf' => 'application/pdf'
);

$file = __DIR__ . '/files/' . $row['disk_name'];

header('Content-Description: File Transfer');
header('Content-Type: ' . $mimeTypes[$row['ext']]);
header('Content-Disposition: attachment; filename="'. $row['name'] .'"');
header('Content-Transfer-Encoding: binary');
header('Connection: Keep-Alive');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
readfile($file);
die();

下载的.PHP文件比相应的PDF文件大1KB。在记事本中，下载为.PHP的PDF文件中的额外内容如下所示：

The .PHP files that are downloaded are 1KB larger than the corresponding PDF files. In notepad, the extra content in a PDF file downloaded as .PHP looks like this:

Û¼T"gS_åœx¨fꙸx0]Ï~0î…[#X7beú
Œ¾){(‹Ã ‰ždêò¤ž
^`ô}\ȯDdìè¬#¸A,.Û­àÇ3ðuúÑÅIôo GP‘pð.bWædÎVª8¨‹ÃÚï~"½1ÚùYGrƒ^º9YçãžÁa0]žÿ{VP\§•ÑúÄ›\²/Óa4§ R   Â×ïYGrøå3¨$Ë  Køpf%„   HÐá@~Tyw«ðŠfPý—@òwæà– Ác8rI:2ëÅ*P5„*‚øïÖ`»´æí£³Èx€–T$W³d´ HÏy»…G˜ÊÃ?Ž=TÐð+PÊÃc6’q
¥üQ˜Q¦GØšOQò‹¹t‡€öGz‚‘«mØÌ&Æ5kPnd Ôs˜ù7Ê¢ø=à¦Uïºd"Âœ¸ÐîÌóÏlnŒVšÊ¤P[¾ò¸ª‹„mÊO/
‹xï$   Ƶ¤%0´7M?ÒÙdaã1ÓKùaPÌZó†A¬møY¨¿D›K²Ji;w €9ö>*®h³³†‚wRy¶=s+U\ñd¤™ýØ·ÇΗú®Q–kÈ(˜´jñWQd©¢à¦MÌw½Ÿt°Z±Þa¾co{Ö`ȳŸô¯òje©ÒPióBL$"ÓP/&´ÆÞµš9h–)lŸk  )
À„uÚº'Ûˆ"Ô_4~‹}]?óâùg3 Ô¨?ËL¡ê*¢‰"çS)  M³‘*LâGG…®sœùw;¤N`Åx½cëu  'oJæeÆ_M½ËÒXÈ…³„{ÈŃ)õ³P´œ»SI™P,éH@¸’ÄÌ^ÓÙb§[id˜_^çî>zflø€aÞ‹€% G‘,=ùI¦ÕaˆVEÃvoûl•>`ÂÆJ^V›ƒ
:"ˆi„ÄÐ’@€Ð—ìRy¯ '¡šË¢›Øƒ
Æ[&ÉF›­’_+Õ¢$ÜÜMãºÏ€u},w†¼BœÄA`R¤dYm)Œ$¤<},<³Ó_¥æËÒP|&Tj; •ê¥U0h|&Õ}©¸t‹s *1žõŽ2„E'…ÛnäYjë— Tg¡’v•[  ¥ì¤îK¨ä–t$ üñ\؉¸X€R+e^ªx;£ÌË&ä´R®ðúpR_Åíf ^,vžÒJcAŽ•<O€LR1%ªP¡Ãê–x]º¬#Îs?¨üVŽ*jæ ¤Úbª£ê£«â7îm]û$ ÇUfGÄo£ÒÛþO#ƒÞ©?t±ª·PN¹¡8¨i°<ôyZ_lGÞJÕ\Y{®Hõ X~
¸Å‘"H; «™
a™Žl%BÅׄ]Œ‹ešµR…JÏeÕÒ(gH©,ÓÚaIR/¤¬Ÿ#? J  ¸’„"ã.žÚ#§j¥Š³çŠtâÅ°^)¹Ï(Pm°¢¨–ÕÒ‹ˆk)ÂÚý£Ò5 $W¬WPa&/çG1ÈDaÕû²Žâ:¥§š™"2HŸˆUë«WŒRF°"²yݳYEÂÁoØŠ?@‘dŠ-HVÑîÝ?jÆr)¨º7¥Bd–•u$¼&Eê®eùµRÂf,UË Û«‚•jõYšU²±Ú!ò#¼–aÐÍU°ÚsVTö
­ìÄ^úª•
Tصr‡gPùÅ™0©S"ûË‘.œÅå•   ³‘„ôjÞ6ËÂOçÌAj?j÷,¬ÎpRŸx}Äd$ÌpÓxÇnÚŽ3yä/rž©öU™ö¢‘ú²ÇGÁ£È¡/L<賎Drþy·³Ú¨•*nîªS±µN+¶IÓª5ô®üÕ¶fâ•×|+ë­vØ×J·¶>ž²ÞÅ&4k>HTTP/1.1 200 OK
Date: Fri, 26 Jul 2013 03:24:16 GMT
Server: Apache/2.4.2 (Win64) PHP/5.4.3
X-Powered-By: PHP/5.4.3
Expires: 0
Cache-Control: must-revalidate, post-check=0, pre-check=0
Pragma: public
Content-Description: File Transfer
Content-Disposition: attachment; filename="bst-bmp180-ds000-08.pdf"
Content-Transfer-Encoding: binary
Connection: Keep-Alive, Keep-Alive
Content-Length: 752201
Keep-Alive: timeout=5, max=99
Content-Type: application/pdf

我做错了什么导致这种情况发生？

What am I doing wrong that is causing this to happen?

推荐答案

添加 ob_clean（）; 和flush（）; 函数之前的 readfile（）; 函数，可能是值得的使用，根据PHP手册中关于该主题的说明。

Adding ob_clean(); and flush(); functions before the readfile(); function, could be something worth using, as per what the PHP manual states on the subject.

readfile（）
http://php.net/manual/en/function.readfile.php

readfile() http://php.net/manual/en/function.readfile.php

ob_clean（） http://php.net/manual/en/function.ob- clean.php

ob_clean() http://php.net/manual/en/function.ob-clean.php

flush（）
http://php.net/manual/en/function.ob-flu sh.php

这些功能不在您发布的代码中。

These functions are not present in your posted code.

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