Simple analysis of PHP file upload principle_PHP tutorial

//Form uploads can only use the multipart/form-data encoding format
$_FILES system function;
$_FILES['myFile']['name']File name
$_FILES['myFile'][ 'type'] file type, restricted by the server
image/**
image/x-png
application/x-zip-compressed
$_FILES['myFile']['size ']Upload file size
$_FILES['myFile']['tmp_name'] Save temporary file name after uploading service
$_FILES['myFile']['error'] Error code;
0 Success 1 Exceeds php.ini size 2 Exceeds the value specified by the MAX_FILE_SIZE option
3 Only partially uploaded 5 Uploaded file size is 0

move_uploaded_file (temporary file, target location and file name);
Moved after upload The function that files to the target location
is_uploaded_file(MIME);
The file function that determines the uploaded MIME type

Copy the code The code is as follows:

if(is_uploaded_file($_FILES['myFile']['tmp_name'])){
$upfile = $_FILES['upload'];
$name = $upfile ['name'];
$type = $upfile['type'];
$size = $upfile['size'];
$tmp_name = $upfile['tmp_name'];
$error = $upfile['error'];
switch($type){
case 'image/pjpeg' : $ok=1;
break
}
if($ ok){
move_uploaded_file($tmp_name,'up/'.$name);
}else{
echo "File type not allowed";
}
}

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