本文汇集PHP开发中经常用到的十段代码，包括Email、64位编码和解码、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﹥ ﹤symbol﹥ben﹤/symbol﹥ ﹤code﹥A﹤/code﹥ ﹤/molecule﹥ ﹤molecule﹥ ﹤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.'https://www.jb51.net/'.$file,$newLocation.'https://www.jb51.net/'.$file); unlink($location.'https://www.jb51.net/'.$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'; ?﹥
PHP常用功能如下
1.PHP字符串
字符串声明 变量=''或者""（一般情况会使用单引号，因为写起来会比较方便）
$str = 'Hello PHP';
echo $str;
strpos 计算字符在字符串中的位置（从0开始）
$str = 'Hello PHP';
echo strpos($str,'o'); //计算字符在字符串中的位置
echo '<br/>';
echo strpos($str,'PH');
substr 截取字符串
$str = 'Hello PHP';
//截取字符串
$str1 = substr($str,2,3); //从2位置开始截取，截取长度为3的字符串
echo $str1;
不传入长度参数的话，会从指定位置一直截取到字符串的末尾
str_split 分割字符串 固定长度的分割（默认长度为1）