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November 14, 2016 23:06
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php ajax longpoll . contoh untuk broadcast message . silahkan ubah var. $rahasia , kode rahasia ini dipakai untuk mencegah merubah nilai $id terakhir di sisi client. silahkan ubah juga host, username & password mysql jika diperlukan.di browser akses : http://localhost/phplongpoll.php
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| <?php | |
| set_time_limit(0); | |
| $rahasia = '$r4h@5!4'; | |
| $dbname = 'dbname=dbchat'; | |
| include 'kueridb.php'; | |
| $err = 0; | |
| $rslt = kueridb($err, 'SELECT MAX(id) as id FROM chat'); | |
| if($err) die("salah kueri: $err"); | |
| if(empty($rslt[0]['id'])){ | |
| $id = 0; | |
| }else if(empty($_COOKIE['id']) || empty($_COOKIE['ck'])){ | |
| $id = $rslt[0]['id']; | |
| }else{ | |
| $id = $_COOKIE['id']; | |
| if(hash_hmac('sha1', $id, $rahasia) != $_COOKIE['ck']) die('salah id'); | |
| } | |
| do{ | |
| $rslt = kueridb($err, 'SELECT * FROM chat WHERE id > ?', [$id]); | |
| if($err) die("salah kueri: $err"); | |
| sleep(1); | |
| }while(empty($rslt)); | |
| foreach($rslt as $row){ | |
| $pesan[]=$row['pesan']; | |
| } | |
| setcookie('id', $row['id']); | |
| setcookie('ck', hash_hmac('sha1', $row['id'], $rahasia)); | |
| echo implode('\n', $pesan); |
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| <?php | |
| $dbname = 'dbname=dbchat'; | |
| include 'kueridb.php'; | |
| if(empty($_POST['pesan'])) die; | |
| $err = 0; | |
| kueridb($err, 'INSERT INTO chat(pesan) VALUES (?)', [$_POST['pesan']]); | |
| if($err) die("salah kueri: $err"); |
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| <?php | |
| $dbh = new PDO("mysql:host=localhost;$dbname", 'root', ''); | |
| function kueridb(&$err, $sql, $param=null){ | |
| global $dbh; | |
| $sth = $dbh->prepare($sql); | |
| $sth->execute($param); | |
| $rslt = $sth->fetchAll(); | |
| $err = $sth->errorInfo()[1]; | |
| //var_dump($err); | |
| return $rslt; | |
| } |
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| <?php | |
| $dbname = ''; | |
| include 'kueridb.php'; | |
| $sql1 = 'CREATE DATABASE IF NOT EXISTS dbchat'; | |
| $sql2 = 'USE dbchat'; | |
| $sql3 = 'CREATE TABLE IF NOT EXISTS chat (id INT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY, pesan VARCHAR(140) NOT NULL) ENGINE=MEMORY'; | |
| $err = 0; | |
| kueridb($err, "$sql1;$sql2;$sql3"); | |
| if($err) die("salah kueri: $err"); | |
| ?> | |
| <html> | |
| <head> | |
| <script> | |
| function ajax(method, url, kueri, callback){ | |
| try{ var xhr=new XMLHttpRequest();}catch(err){ return alert("tidak support ajax");} | |
| xhr.onreadystatechange = function(){ | |
| if(4 == xhr.readyState && 200 == xhr.status){ | |
| callback&&callback(xhr.responseText); | |
| } | |
| } | |
| if(-1 != "GET,DELETE".indexOf(method)){ | |
| if(kueri) url += "?"+kueri; | |
| kueri=null; | |
| } | |
| xhr.open(method, url); | |
| kueri&&xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); | |
| xhr.send(kueri); | |
| } | |
| </script> | |
| </head> | |
| <body> | |
| <textarea id="daftarpesan" readonly></textarea><br> | |
| <input id="pesan"><br> | |
| <button onclick="kirim()">kirim</button> | |
| <script> | |
| daftarpesan.value=""; pesan.value=""; pesan.focus(); | |
| function longpoll(){ | |
| ajax("GET", "/chatlongpoll.php", "v="+(new Date()).getTime().toString(36), function(respon){ | |
| daftarpesan.value = respon + "\n" + daftarpesan.value; | |
| pesan.value=""; | |
| pesan.focus(); | |
| longpoll(); | |
| }); | |
| } | |
| longpoll(); | |
| function kirim(){ | |
| ajax("POST", "/chatxhr.php", "pesan="+pesan.value); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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revisi terakhir , akses browser jadi : http://localhost/phplongpoll.php
