PHP中上传多个文件的表单设计例子_php技巧
多个文件上传和单独文件上传的处理方式是一样的,只需要在客户端多提供几个类型为“file”的输入表单,并指定不同的“name”属性值。例如,在下面的代码中,可以让用户同时选择三个本地文件一起上传给服务器,客户端的表单如下所示:
在上面的代码中,将三个文件类型的表单以数组的形式组织在一起。当上面的表单教给PHP的脚本文件mul_upload.php时,在服务器端同样使用全局数组$_FILES存储所有上述文件的信息,但$_FILES由二维数组已经转变为三维数组,这样就可以存储多个上传文件的信息。在脚本文件mul_upload.php中,使用print_r()函数将$_FILES数组中的内容输出,代码如下所示:
//打印三维数组$_FILES中的内容,查看一下存储上传文件的结构
print_r($_FILES);
?>
当选择三个本地文件提交后,输出结果如下所示:
Array(
[myfile]=>Array(
[name]=>Array( ---$_FILES["myfile"]["name"]存储所有上传文件的内容
[0]=>Rav.ini ---$_FILES["myfile"]["name"][0]第一个上传文件的名称
[1]=>msgsocm.log ---$_FILES["myfile"]["name"][1]第二个上传文件的名称
[2]=>NOTEPAD.EXE) ---$_FILES["myfile"]["name"][2]第三个上传文件的名称
[type]=>Array( ---$_FILES["myfile"]["type"]存储所有上传文件的类型
[0]=>application/octet-stream ---$_FILES["myfile"]["type"][0]第一个上传文件的类型
[1]=>application/octet-stream ---$_FILES["myfile"]["type"][1]第二个上传文件的类型
[2]=>application/octet-stream) ---$_FILES["myfile"]["type"][2]第三个上传文件的类型
[tmp_name]=>Array(
[0]=>C:\WINDOWS\Temp\phpAF.tmp
[1]=>C:\WINDOWS\Temp\phpB0.tmp
[2]=>C:\WINDOWS\Temp\phpB1.tmp)
[error]=>Array(
[0]=>0
[1]=>0
[2]=>0)
[size]=>Array(
[0]=>64
[1]=>1350
[2]=>66560))
)
通过输出$_FILES数组的值可以看到,处理多个文件的上传和单个文件上传时的情况一样的,只是$_FILES数组的结构形式略有不同。通过这种方式可以支持更多数量的文件上传。

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