help

system · December 31, 2010, 12:56pm

Dear sir i am .net developer (c#) and want to understand php code plz help me and send it on my mail id plz

////////////…code is…

<?php /* Copyright (c) 2009 Anant Garg (anantgarg.com | inscripts.com) This script may be used for non-commercial purposes only. For any commercial purposes, please contact the author at [email protected] THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ define ('DBPATH','localhost'); define ('DBUSER','root'); define ('DBPASS','password'); define ('DBNAME','chat'); session_start(); global $dbh; $dbh = mysql_connect(DBPATH,DBUSER,DBPASS); mysql_selectdb(DBNAME,$dbh); if ($_GET['action'] == "chatheartbeat") { chatHeartbeat(); } if ($_GET['action'] == "sendchat") { sendChat(); } if ($_GET['action'] == "closechat") { closeChat(); } if ($_GET['action'] == "startchatsession") { startChatSession(); } if (!isset($_SESSION['chatHistory'])) { $_SESSION['chatHistory'] = array(); } if (!isset($_SESSION['openChatBoxes'])) { $_SESSION['openChatBoxes'] = array(); } function chatHeartbeat() { $sql = "select * from chat where (chat.to = '".mysql_real_escape_string($_SESSION['username'])."' AND recd = 0) order by id ASC"; $query = mysql_query($sql); $items = ''; $chatBoxes = array(); while ($chat = mysql_fetch_array($query)) { if (!isset($_SESSION['openChatBoxes'][$chat['from']]) && isset($_SESSION['chatHistory'][$chat['from']])) { $items = $_SESSION['chatHistory'][$chat['from']]; } $chat['message'] = sanitize($chat['message']); $items .= <<<EOD { "s": "0", "f": "{$chat['from']}", "m": "{$chat['message']}" }, EOD; if (!isset($_SESSION['chatHistory'][$chat['from']])) { $_SESSION['chatHistory'][$chat['from']] = ''; } $_SESSION['chatHistory'][$chat['from']] .= << $time) { if (!isset($_SESSION['tsChatBoxes'][$chatbox])) { $now = time()-strtotime($time); $time = date('g:iA M dS', strtotime($time)); $message = "Sent at $time"; if ($now > 180) { $items .= <<<EOD { "s": "2", "f": "$chatbox", "m": "{$message}" }, EOD; if (!isset($_SESSION['chatHistory'][$chatbox])) { $_SESSION['chatHistory'][$chatbox] = ''; } $_SESSION['chatHistory'][$chatbox] .= <<

{
“items”: [
<?php echo $items;?>
]
}

<?php exit(0); } function chatBoxSession($chatbox) { $items = ''; if (isset($_SESSION['chatHistory'][$chatbox])) { $items = $_SESSION['chatHistory'][$chatbox]; } return $items; } function startChatSession() { $items = ''; if (!empty($_SESSION['openChatBoxes'])) { foreach ($_SESSION['openChatBoxes'] as $chatbox => $void) { $items .= chatBoxSession($chatbox); } } if ($items != '') { $items = substr($items, 0, -1); } header('Content-type: application/json'); ?>

{
“username”: “<?php echo $_SESSION['username'];?>”,
“items”: [
<?php echo $items;?>
]
}

<?php exit(0); } function sendChat() { $from = $_SESSION['username']; $to = $_POST['to']; $message = $_POST['message']; $_SESSION['openChatBoxes'][$_POST['to']] = date('Y-m-d H:i:s', time()); $messagesan = sanitize($message); if (!isset($_SESSION['chatHistory'][$_POST['to']])) { $_SESSION['chatHistory'][$_POST['to']] = ''; } $_SESSION['chatHistory'][$_POST['to']] .= <<<EOD { "s": "1", "f": "{$to}", "m": "{$messagesan}" }, EOD; unset($_SESSION['tsChatBoxes'][$_POST['to']]); $sql = "insert into chat (chat.from,chat.to,message,sent) values ('".mysql_real_escape_string($from)."', '".mysql_real_escape_string($to)."','".mysql_real_escape_string($message)."',NOW())"; $query = mysql_query($sql); echo "1"; exit(0); } function closeChat() { unset($_SESSION['openChatBoxes'][$_POST['chatbox']]); echo "1"; exit(0); } function sanitize($text) { $text = htmlspecialchars($text, ENT_QUOTES); $text = str_replace("\n\r","\n",$text); $text = str_replace("\r\n","\n",$text); $text = str_replace("\n","
",$text); return $text; }