简单上传文件源码

<?php
// 注册表单的姓名
$name="";
$nameErr="";
if ($_SERVER["REQUEST_METHOD"]=="POST") {
	if (empty($_POST['name'])) {
	}else{
		$name=$_POST['name'];
		if (!preg_match("/^[a-zA-Z]*$/", $name)) {
			$nameErr="只允许字母和空格";
		}else{
			echo '姓名'.$name;
		}
	}

	// 文件上传
		if ((($_FILES["file"]["type"] == "image/gif")
		|| ($_FILES["file"]["type"] == "image/jpeg")
		|| ($_FILES["file"]["type"] == "image/pjpeg"))
		&& ($_FILES["file"]["size"] < 2000000))
    	{

			if ($_FILES["file"]["error"]>0) {
				echo "错误：".$_FILES["file"]["error"]."
";

			}else{
				echo "upload:".$_FILES["file"]["name"]."
";
				echo "type:".$_FILES["file"]["type"]."
";
				echo "size:".$_FILES["file"]["size"]."
";
				echo "stored in:".$_FILES["file"]["tmp_name"];
			}	
		}else{
			if (file_exists("weiwei/".$_FILES["file"]["name"])) {
				echo $_FILES["file"]["name"]."上传成功.";
			}else{
				 move_uploaded_file($_FILES["file"]["tmp_name"],
		      "weiwei/" . $_FILES["file"]["name"]);
		      echo "Stored in: " . "weiwei/" . $_FILES["file"]["name"];
			}

	echo "上传成功";

}

}
	
?>