10段PHP常用功能代码

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本文汇集PHP开发中经常用到的时段代码，包括Email、解压缩、64位编码、解析JSON等，希望对您有所帮助。

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
function base64url_encode($plainText) {
$base64 = base64_encode($plainText);
$base64url = strtr($base64, '+/=', '-_,');
return $base64url;
}
function base64url_decode($plainText) {
$base64url = strtr($plainText, '-_,', '+/=');
$base64 = base64_decode($base64url);
return $base64;
}

3、获取远程IP地址
function getRealIPAddr()
{
if (!empty($_SERVER['HTTP_CLIENT_IP']))   //check ip from share internet
{
$ip=$_SERVER['HTTP_CLIENT_IP'];
}
elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))   //to check ip is pass from proxy
{
$ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
}
else
{
$ip=$_SERVER['REMOTE_ADDR'];
}
return $ip;
}

4、 日期格式化
function checkDateFormat($date)
{
//match the format of the date
if (preg_match ("/^([0-9]{4})-([0-9]{2})-([0-9]{2})$/", $date, $parts))
{
//check weather the date is valid of not
if(checkdate($parts[2],$parts[3],$parts[1]))
return true;
else
return false;
}
else
return false;
}
5、验证Email
$email = $_POST['email'];
if(preg_match("~([a-zA-Z0-9!#$%&'*+-/=?^_`{|}~])@([a-zA-Z0-9-]).
([a-zA-Z0-9]{2,4})~",$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 name='Benzine'﹥
﹤symbol﹥ben﹤/symbol﹥
﹤code﹥A﹤/code﹥
﹤/molecule﹥
﹤molecule name='Water'﹥
﹤symbol﹥h2o﹤/symbol﹥
﹤code﹥K﹤/code﹥
﹤/molecule﹥
﹤/moleculedb﹥";
//load the xml string using simplexml function
$xml = simplexml_load_string($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 /﹥';
}

7、数据库连接
﹤?php
if(basename(__FILE__) == basename($_SERVER['PHP_SELF'])) send_404();
$dbHost = "localhost";        //Location Of Database usually its localhost
$dbUser = "xxxx";            //Database User Name
$dbPass = "xxxx";            //Database Password
$dbDatabase = "xxxx";       //Database Name
$db = mysql_connect("$dbHost", "$dbUser", "$dbPass") or
die ("Error connecting to database.");
mysql_select_db("$dbDatabase", $db) or die ("Couldn't select the database.");
# This function will send an imitation 404 page if the user
# types in this files filename into the address bar.
# only files connecting with in the same directory as this
# file will be able to use it as well.
function send_404()
{
header('HTTP/1.x 404 Not Found');
print '﹤!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"﹥'."n".
'﹤html﹥﹤head﹥'."n".
'﹤title﹥404 Not Found﹤/title﹥'."n".
'﹤/head﹥﹤body﹥'."n".
'﹤h1﹥Not Found﹤/h1﹥'."n".
'﹤p﹥The requested URL '.
str_replace(strstr($_SERVER['REQUEST_URI'], '?'), '', $_SERVER['REQUEST_URI']).
' was not found on this server.﹤/p﹥'."n".
'﹤/body﹥﹤/html﹥'."n";
exit;
}
# In any file you want to connect to the database,
# and in this case we will name this file db.php
# just add this line of php code (without the pound sign):
# include"db.php";
?﹥

8、创建和解析JSON数据
$json_data = array ('id'=﹥1,'name'=﹥"rolf",'country'=﹥'russia',
"office"=﹥array("google","oracle"));
echo json_encode($json_data);

9、处理MySQL时间戳
$query = "select UNIX_TIMESTAMP(date_field) as mydate
from mytable where 1=1";
$records = mysql_query($query) or die(mysql_error());
while($row = mysql_fetch_array($records))
{
echo $row;
}

10、解压缩Zip文件
﹤?php
function unzip($location,$newLocation){
if(exec("unzip $location",$arr)){
mkdir($newLocation);
for($i = 1;$i﹤ count($arr);$i++){
$file = trim(preg_replace("~inflating: ~","",$arr[$i]));
copy($location.'/'.$file,$newLocation.'/'.$file);
unlink($location.'/'.$file);
}
return TRUE;
}else{
return FALSE;
}
}
?﹥
//Use the code as following:
﹤?php
include 'functions.php';
if(unzip('zipedfiles/test.zip','unziped/myNewZip'))
echo 'Success!';
else
echo 'Error';
?﹥