CH13,p242.练习二，控制上传文件大小

<?php if($_FILES['files']['name']==true){$filesize=$_FILES['files']['size'];if($filesize>1000000){echo "对不起,您上传的文件超过规定的大小!!";echo "<meta http-equiv=\"Refresh\" content=\"3;url=index.php\">将在3秒钟后返回前页...";}else{$path = './upfiles/'. $_FILES['files']['name'];if (move_uploaded_file($_FILES['files']['tmp_name'],$path)) { echo "上传成功!!";echo "<meta http-equiv=\"Refresh\" content=\"3;url=index.php\">"; }else{echo "文件上传失败!!";          echo "<meta http-equiv=\"Refresh\" content=\"3;url=index.php\">";}}}?>