资料注册后发信小技巧

<?php 
//mail.php 
//读信内容 
$filename = "wellcom.txt"; 
$fd = fopen( $filename, "r" ); 
$contents = fread($fd, filesize($filename)); 
fclose( $fd ); 

//替换其中相应内容 
$contents=eregi_replace("<username>",$UserName,$contents); 
$contents=eregi_replace("<password>",$Password,$contents); 
$contents=eregi_replace("<url>",$Url,$contents); 

//发信 
$to_email=$email; 
$from_email="php-java@21cn.com"; 
$subject="Wellcom!"; 
$header_info="From:$from_email\nReply-To:$from_email"; 
$result=@mail($to_email,$subject,$contents,$header_info); 
if($result) { 
echo "发信成功！"; 
} else { 
echo "发信失败！"; 
} 
?> 

//wellcom.txt内容； 
您的注册资料为： 
用户名：<username> 
密码：<password> 

欢迎您的到来！ 

欢迎访问：<url>