What folder is p2pcache? Simple analysis of PHP file upload principle

//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 to service
$_FILES['myFile']['error'] Error code;
0 Success 1 Exceeded php.ini size 2 Exceeded the value specified by MAX_FILE_SIZE option
3 Only partial upload 5 Upload The file size is 0
move_uploaded_file (temporary file, target location and file name);
Function to move the file to the target location after uploading
is_uploaded_file(MIME);
Function to determine the uploaded MIME type of the file

Copy code Code 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 ";
}
}

The above has introduced what kind of folder p2pcache is. A simple analysis of the principle of PHP file upload, including what kind of folder p2pcache is. I hope it will be helpful to friends who are interested in PHP tutorials.