When PHP is uploading multiple images, the HTML file uses file to receive the files why the file array is not generated

by Var_dump ($_file)

If you use file[]

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by Var_dump ($_file)

If you use file[]

First, you pass an array parameter, and the parameter name must be preceded by [] a normal parse, all of which you have to use upload_file[] as the parameter name.
Second, the array form of file upload, in PHP parsing is not parsed into a file array (this is called the existence of a bug), but will be parsed into the results you see, in the parameter name has become an array, NAME0] represents the first file name Name[1] Indicates the name of the second file ..., and the type, tmp_name, and other parameters are the same, that is, you want to get the information to upload the first file, you get the $_files[' upload_file ' 0], $_files[' upload_file ' [ 0] ...
Helpless PHP parsing file array is like this, this is often spit slot

Name= "upload_file[]"

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