final destination PHP $_FILES function detailed explanation

For example:

Copy code The code is as follows:

Then upload.php can directly use
$_FILES
$_POST
$_GET
and other functions to obtain the form content.
Today we focus on the $_FILES function.
When the client submits, we obtain a $_FILES array
The contents of the $_FILES array are as follows:
$_FILES['myFile']['name'] The original name of the client file.
$_FILES['myFile']['type'] The MIME type of the file, which requires the browser to provide support for this information, such as "image/gif".
$_FILES['myFile']['size'] The size of the uploaded file, in bytes.
$_FILES['myFile']['tmp_name'] The temporary file name stored on the server after the file is uploaded, usually the system default. It can be specified in upload_tmp_dir of php.ini, but setting it with the putenv() function will not work.
$_FILES['myFile']['error'] Error code related to the file upload. ['error'] was added in PHP 4.2.0. The following is its description: (They became constants after PHP3.0)
UPLOAD_ERR_OK
Value: 0; No error occurred, the file was uploaded successfully.
UPLOAD_ERR_INI_SIZE
Value: 1; The uploaded file exceeds the value limited by the upload_max_filesize option in php.ini.
UPLOAD_ERR_FORM_SIZE
Value: 2; The size of the uploaded file exceeds the value specified by the MAX_FILE_SIZE option in the HTML form.
UPLOAD_ERR_PARTIAL
Value: 3; Only part of the file was uploaded.
UPLOAD_ERR_NO_FILE
Value: 4; No file was uploaded.
Value: 5; The uploaded file size is 0.
After the file is uploaded, it is stored in the temporary directory by default. At this time, you must delete it from the temporary directory or move it to other places. If not, it will been deleted. That is to say, regardless of whether the upload is successful or not, the files in the temporary directory will definitely be deleted after the script is executed. Therefore, you need to use PHP's copy() function to copy it to another location before deleting it. At this time, the file upload process is completed.

The above introduces the detailed explanation of the final destination PHP $_FILES function, including the content of final destination. I hope it will be helpful to friends who are interested in PHP tutorials.