在php上传文件或图片时我们会碰到要限制上传文件的类型，如果我们单只限制后缀名是很容易给绕过去的，下面我找了一些后辍名对应mine对照表，希望对大家有帮助。
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使用php脚本上传文件时需要将文件格式处理为php所认识的文件类型，例如（.jpg的文件格式为image/jpeg）。这个格式的判断首先是由浏览器完成的，浏览器通过表单的提交判断是某类文件，再提交给php进行处理。
有时候不同浏览器对文件类型的定义不相同，因此有时候需要对不同的浏览器做判断。其实可以将不同浏览器的类型都加入到判断中。
下面提供一张IE和火狐浏览器的文件类型对照表：
| ie |
火狐 |
| id |
后缀名 |
php识别出的文件类型 |
| 0 |
gif |
image/gif |
| 1 |
jpg |
image/jpeg |
| 2 |
png |
image/png |
| 3 |
bmp |
image/bmp |
| 4 |
psd |
application/octet-stream |
| 5 |
ico |
image/x-icon |
| 6 |
rar |
application/octet-stream |
| 7 |
zip |
application/zip |
| 8 |
7z |
application/octet-stream |
| 9 |
exe |
application/octet-stream |
| 10 |
avi |
video/avi |
| 11 |
rmvb |
application/vnd.rn-realmedia-vbr |
| 12 |
3gp |
application/octet-stream |
| 13 |
flv |
application/octet-stream |
| 14 |
mp3 |
audio/mpeg |
| 15 |
wav |
audio/wav |
| 16 |
krc |
application/octet-stream |
| 17 |
lrc |
application/octet-stream |
| 18 |
txt |
text/plain |
| 19 |
doc |
application/msword |
| 20 |
xls |
application/vnd.ms-excel |
| 21 |
ppt |
application/vnd.ms-powerpoint |
| 22 |
pdf |
application/pdf |
| 23 |
chm |
application/octet-stream |
| 24 |
mdb |
application/msaccess |
| 25 |
sql |
application/octet-stream |
| 26 |
con |
application/octet-stream |
| 27 |
log |
text/plain |
| 28 |
dat |
application/octet-stream |
| 29 |
ini |
application/octet-stream |
| 30 |
php |
application/octet-stream |
| 31 |
html |
text/html |
| 32 |
htm |
text/html |
| 33 |
ttf |
application/octet-stream |
| 34 |
fon |
application/octet-stream |
| 35 |
js |
application/x-javascript |
| 36 |
xml |
text/xml |
| 37 |
dll |
application/octet-stream |
| 38 |
dll |
application/octet-stream |
|
| id |
后缀名 |
php识别出的文件类型 |
| 0 |
gif |
image/gif |
| 1 |
jpg |
image/pjpeg |
| 2 |
png |
image/x-png |
| 3 |
bmp |
image/bmp |
| 4 |
psd |
application/octet-stream |
| 5 |
ico |
image/x-icon |
| 6 |
rar |
application/octet-stream |
| 7 |
zip |
application/x-zip-compressed |
| 8 |
7z |
application/octet-stream |
| 9 |
exe |
application/octet-stream |
| 10 |
avi |
video/avi |
| 11 |
rmvb |
application/vnd.rn-realmedia-vbr |
| 12 |
3gp |
application/octet-stream |
| 13 |
flv |
application/octet-stream |
| 14 |
mp3 |
audio/mpeg |
| 15 |
wav |
audio/wav |
| 16 |
krc |
application/octet-stream |
| 17 |
lrc |
application/octet-stream |
| 18 |
txt |
text/plain |
| 19 |
doc |
application/msword |
| 20 |
xls |
application/vnd.ms-excel |
| 21 |
ppt |
application/vnd.ms-powerpoint |
| 22 |
pdf |
application/pdf |
| 23 |
chm |
application/octet-stream |
| 24 |
mdb |
application/msaccess |
| 25 |
sql |
text/plain |
| 26 |
con |
application/octet-stream |
| 27 |
log |
text/plain |
| 28 |
dat |
text/plain |
| 29 |
ini |
application/octet-stream |
| 30 |
php |
application/octet-stream |
| 31 |
html |
text/html |
| 32 |
htm |
text/html |
| 33 |
ttf |
application/octet-stream |
| 34 |
fon |
application/octet-stream |
| 35 |
js |
text/html |
| 36 |
xml |
text/xml |
| 37 |
dll |
application/octet-stream |
| 38 |
class |
application/java |
|
下面看一个实例
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| 代码如下 |
复制代码 |
|
$temppath=$upfile['tmp_name'];
$fileinfo=pathinfo($upfile['name']);
$extension=$upfile['type'];
//echo $extension;
//exit;
switch( $extension )
{
case 'application/msword':
$extension ='doc';
break;
case 'application/vnd.ms-excel':
$extension ='xls';
break;
case 'application/vnd.openxmlformats-officedocument.wordprocessingml.document':
$extension ='docx';
break;
case 'application/vnd.ms-powerpoint':
$extension ='ppt';
break;
case 'application/pdf':
$extension ='pdf';
break;
case 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet':
$extension ='xlsx';
break;
default:
die('只允许上传doc,docx,xls,pdf,ppt文件 重新上传');
}
|
上面实例就限制了只能上传doc,docx,xls,pdf,ppt了，这样如果有人想利用后缀名上传其它如php或asp文件就存在会提示上传文件不合法。
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