PHP上传文件

HTML

<form action="upload.php" method="post" enctype="multipart/form-data">
<input type="file" name="file">
<input type="submit" value="上传">
</form>

PHP

upload.php

<?php
	$dir = 'upload/';
	if (!is_dir($dir)) {
		mkdir($dir, 0755, true);
	}
	$tempFile = $_FILES['file']['tmp_name'];
	$targetFile = $dir . $_FILES['file']['name'];	
	echo $tempFile.'<br>';
	echo $targetFile.'<br>';
	if (move_uploaded_file($tempFile, $targetFile)) {
		echo "文件上传成功";
	} else {
		echo "文件上传失败";
	}	
?>

输出

C:\Users\HY\AppData\Local\Temp\phpF7F3.tmp
uploads/a.jpg
文件上传成功

如何返回文件路径呢？