<?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 Reply-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>