关于github上函数的未知参数

Question

I found a good function on github for uploading images using php, but I do not know one of its arguments.

upload_image($_FILES,'file',250,'city',500,'../../uploaded/',1048576);

Function on Github

1. What is 'file' in this function?
2. Is this a trusted function to use in my website?

Answer 1

Considering the lines :

$file[$fileIndex]['tmp_name']
$file[$fileIndex]['error']
$file[$fileIndex]['name']
$file[$fileIndex]['type']
$file[$fileIndex]['size']

$file is a three-dimensional array , composed of arrays of name , tmp_name , type , size , error .
It is the kind of array you see when uploading files in PHP .

It calls move-uploaded-file , which moves an uploaded file to a new location.

This function checks to ensure that the file designated by filename is a valid upload file (meaning that it was uploaded via PHP's HTTP POST upload mechanism).
If the file is valid, it will be moved to the filename given by destination .