php 檔案上傳的原理簡單介紹

<form enctyoe="multipart/form-data" method="post" name="upload"> 
<input name="upfile" name="name"> 
</form> 
if(is_uploaded_file($_FILES[&#39;myFile&#39;][&#39;tmp_name&#39;])){ 
$upfile = $_FILES[&#39;upload&#39;]； 
$name = $upfile[&#39;name&#39;]; 
$type = $upfile[&#39;type&#39;]; 
$size = $upfile[&#39;size&#39;]; 
$tmp_name = $upfile[&#39;tmp_name&#39;]; 
$error = $upfile[&#39;error&#39;]; 
switch($type){ 
case &#39;image/pjpeg&#39; : $ok=1; 
break 
} 
if($ok){ 
move_uploaded_file($tmp_name,&#39;up/&#39;.$name); 
}else{ 
echo "文件类型不允许"; 
} 
}