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 dateif (preg_match (/^([0-9]{4})-([0-9]{2})-([0-9]{2})$/, $date, $parts)){//check weather the date is valid of notif(checkdate($parts[2],$parts[3],$parts[1]))return true;elsereturn false;}elsereturn 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 moleculeforeach ($xml-﹥molecule as $record){ //attribute are accessted by echo $record['name'], ' '; //node are accessted by -﹥ operator echo $record-﹥symbol, ' '; echo $record-﹥code, '﹤br /﹥';}
7、数据库连接
﹤?phpif(basename(__file__) == basename($_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):# includedb.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:﹤?phpinclude '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 '
';
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）
$str = 'hello php';//分割字符串$result = str_split($str); //将结果保存到一个数组中print_r($result); //使用print_r输入一个数组echo '
';$result1 = str_split($str,2);print_r($result1);
explode(分割字符,待分割的字符串) 按照空格进行分割
$str = 'hello php java c# c++';$result = explode(' ',$str);print_r($result);
字符串的连接
$str = 'hello php java c# c++';//字符串的连接$num = 100;$str1 = $str.'
objective-c '.$num;echo $str1;echo '
';$str2 = $str
objective-c $num; //另一中简便的写法echo $str2;