1、使用PHP Mail函数发送Email

　　$to = "viralpatel.net@gmail.com";

　　$subject = "VIRALPATEL.net";

　　$body = "Body of your message here you can use HTML too. e.g.﹤br﹥﹤b﹥ Bold ﹤/b﹥";

　　$headers = "From: Peter\r\n";

　　$headers .= "Reply-To: info@yoursite.com\r\n";

　　$headers .= "Return-Path: info@yoursite.com\r\n";

　　$headers .= "X-Mailer: PHP5\n";

　　$headers .= "MIME-Version: 1.0" . "\n";

　　$headers .= "Content-type: text/html; charset=iso-8859-1"."\r\n";

　　mail($to,$subject,$body,$headers);

　　?﹥

　　2、PHP中的64位编码和解码

　　n base64url_encode($plainText)

　　$base64 = base64_encode($plainText);

　　$base64url = strtr($base64, "+/=", "-_,");

　　return $base64url;

　　n base64url_decode($plainText)

　　$base64url = strtr($plainText, "-_,", "+/=");

　　$base64 = base64_decode($base64url);

　　return $base64;

　　3、获取远程IP地址

　　n getRealIPAddr()

　　if (!empty($_SERVER["HTTP_CLIENT_IP"])) //check ip fromshareinternet

　　$ip=$_SERVER["HTTP_CLIENT_IP"];

　　elseif (!empty($_SERVER["HTTP_X_FORWARDED_FOR"])) //to check ipispass from proxy

　　$ip=$_SERVER["HTTP_X_FORWARDED_FOR"];

　　else

　　$ip=$_SERVER["REMOTE_ADDR"];

　　return $ip;

　　4、 日期格式化

　　n checkDateFormat($date)

　　//match the format of the date

　　if (preg_match ("/^([0-9]4)-([0-9]2)-([0-9]2)$/",$date,$parts))

　　//check weather the date is valid of not

　　return true;

　　else

　　return false;

　　else

　　return false;

　　5、验证Email

　　$email = $_POST["email"];

　　echo "This is a valid email.";

　　else

　　echo "This is an invalid email.";

　　6、在PHP中轻松解析XML

　　//this is a sample xml string

　　$xml_string="﹤?xml version="1.0"?﹥

　　﹤moleculedb﹥

　　﹤molecule﹥

　　﹤symbol﹥ben﹤/symbol﹥

　　﹤code﹥A﹤/code﹥

　　﹤/molecule﹥

　　﹤molecule﹥

　　﹤symbol﹥h2o﹤/symbol﹥

　　﹤code﹥K﹤/code﹥

　　﹤/molecule﹥

　　﹤/moleculedb﹥";

　　//load the xml string using simplexml n

　　$xml = simplexml_load_string($xml_string);

　　//loop through the each node of molecule

　　foreach ($xml-﹥molecule as $record)

　　//attribute are accessted by

　　echo $record["name"], " ";

　　//node are accessted by -﹥ operator

　　echo $record-﹥symbol, " ";

　　echo $record-﹥code, "﹤br /﹥";

【来源：51cto】

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