PHP, 15 code PHP hay dùng trong lập trình website

Viết bởi nguyen thuy lam

Code hay dùng nhất trong Lập trình PHP các bạn nên tham khảo.

PHP, Học PHP, Học Lập trình PHP, Lập trình web PHP

PHP, Lập tình web với PHP& MySQL

Code 1.Send Mail using mail function in PHP

$to = "php.niit@gmail.com";
   $subject = "php.niit";
   $body = "Body of your message here you can use HTML too. e.g.
<br> <b> Bold </b>";
   $headers = "From: Peter";
   $headers .= "Reply-To: info@yoursite.com";
   $headers .= "Return-Path: 'mailto:info@yoursite.com
$headers .= "X-Mailer:
PHP5";
   $headers .= 'MIME-Version: 1.0' . "";
   $headers .= 'Content-type: text/html; charset=iso-8859-1' . "";
   mail($to,$subject,$body,$headers);
   ?>

Code 2.Base64 Encode and Decode String in PHP

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;
   }

Code 3.Get Remote IP Address in PHP

Code 4. Seconds to String

Code 5. Email validation snippet in PHP

$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.';
   }

Code 6. Parsing XML in easy way using PHP

//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 />';
     }

Code 7. Database Connection in PHP

<?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";
     ?>

Code 8. Creating and Parsing JSON data in PHP

$json_data = array ('id'=>1,'name'=>"rolf",'country'=>'russia',
"office"=>array("google","oracle"));
   echo json_encode($json_data);
sử dụng mảng
$json_string='{"id":1,"name":"rolf","country":"russia","office":
["google","oracle"]} ';
   $obj=json_decode($json_string);
   //print the parsed data
   echo $obj->name; //displays rolf
   echo $obj->office[0]; //displays google

Code 9. Process MySQL Timestamp in PHP

$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;
   }

Code 10. Generate An Authentication Code in PHP

<?php
   # This particular code will generate a random string
   # that is 25 charicters long 25 comes from the number
   # that is in the for loop
   $string = "abcdefghijklmnopqrstuvwxyz0123456789";
   for($i=0;$i<25;$i++){
   $pos = rand(0,36);
   $str .= $string{$pos};
   }
   echo $str;
   # If you have a database you can save the string in
   # there, and send the user an email with the code in
   # it they then can click a link or copy the code
   # and you can then verify that that is the correct email
   # or verify what ever you want to verify
   ?>

Code 11. Date format validation in PHP

Code 12. HTTP Redirection in PHP

<?php
header('Location: 'http://you_stuff/url.php'); ?>

Code 13. Directory Listing in PHP

<?php
     function list_files($dir)
     {
     if(is_dir($dir))
     {
     if($handle = opendir($dir))
     {
     while(($file = readdir($handle)) !== false)
     {
     if($file != "." && $file != ".." &&
$file != "Thumbs.db"/*pesky windows, images..*/)
     {
     echo '<a target="_blank" href="'.$dir.$file.'">
'.$file.'</a><br>'."";
     }
     }
     closedir($handle);
     }
     }
     }
     /*
     To use:
     <?php
     list_files("images/");
     ?>
     */
     ?>

Code 14.Browser Detection script in PHP

<?php
$useragent = $_SERVER ['HTTP_USER_AGENT'];
echo "<b>Your User Agent is</b>: " . $useragent;
?>

Code 15. Unzip a Zip File

<?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';
?>

Với 15 code PHP trên hy vọng sẽ đem lại cho các bạn những ý tưởng mới khi lập trình website
Bạn nào yêu thích Lập trình PHP có thể tham khảo khóa học này.

Khóa học	Khai giảng	Lịch học	Giờ học
Lập trình web với PHP & MySQL	24/04	2-4-6	18h00-21h00

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