分享10段PHP常用代码

$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); ?

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;} 

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;}

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;}

$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.';}

//this is a sample xml string$xml_string="?xml version='1.0'?moleculedb molecule name='Benzine' symbolben/symbol codeA/code /molecule molecule name='Water' symbolh2o/symbol codeK/code /molecule/moleculedb";//load the xml string using simplexml function$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 /';}

?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", $db) or die ("Couldn't select the database.");# This function will send an imitation 404 page if the user# types in this files filename into the address bar.# only files connecting with in the same directory as this# file will be able to use it as well.function send_404(){ header('HTTP/1.x 404 Not Found'); print '!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"'."n". 'htmlhead'."n". 'title404 Not Found/title'."n". '/headbody'."n". 'h1Not Found/h1'."n". 'pThe requested URL '. str_replace(strstr($_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";?

$json_data = array ('id'=1,'name'="rolf",'country'='russia',"office"=array("google","oracle"));echo json_encode($json_data);

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

?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';?

$str = 'Hello PHP';//截取字符串$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;

$str = 'Hello PHP';//分割字符串$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 '<br/>';$result1 = str_split($str,2);print_r($result1);

$str = 'Hello PHP Java C# C++';$result = explode(' ',$str);print_r($result);

$str = 'Hello PHP Java C# C++';//字符串的连接$num = 100;$str1 = $str.'<br/>Objective-C '.$num;echo $str1;echo '<br/>';$str2 = "$str<br/>Objective-C $num"; //另一中简便的写法echo $str2;