<html>
<body>
<form action="index3.php" method="post" enctype="multipart/form-data">
<input type="file" name="myfile">
<input type="submit" value="submit">
</form>
</body>
</html>
<?php
if(count($_FILES)>0 && $_FILES["myfile"]["size"]>0){
$upfile=$_FILES["myfile"]["tmp_name"];
if(is_uploaded_file($upfile)){
$destination=$_SERVER["DOCUMENT_ROOT"]."/".$_FILES["myfile"]["name"];
if(move_uploaded_file($upfile, $destination)){
echo $_FILES["myfile"]["name"]."上传成功!";
}
}
}else{
echo '请选择上传文件。';
}