View file mail/send.php

<?php

require '../inc/func.php';
bk_head('Gởi thư');
require '../inc/head.php';


if(!$user){
	header('Location: /index.php');
}
$id_cont = intval($_GET['id_cont']);

$q = mysql_query("SELECT id FROM users WHERE id = '$id_cont'");
if(!mysql_num_rows($q)){
	err (''.$send_mail['no_user'].'<br /><a href="javascript:history.go(-1)">Quay Lại</a>');
	bk_foot();
	exit;
}

if(!$id_cont){
	err (''.$send_mail['err_cont'].'<br /><a href="javascript:history.go(-1)">Quay Lại</a>');
	bk_foot();
	exit;
}

if($id_cont == $userid){
	err (''.$send_mail['isend'].'<br /><a href="javascript:history.go(-1)">Quay Lại</a>');
	bk_foot();
	exit;
}

echo '<div class="list1"><div class="tt">'.$send_mail['title'].'</div>';
echo '<div class="notic">'.$send_mail['to'].'&nbsp;';
user($id_cont);
echo '</div>';



if(isset($_POST['send'])){
	$mess = bk_check($_POST['messages']);

	if (strlen($mess) < 2) {
		$err = '<div class="left_bot">'.$send_mail['strlen'].'</div>';
	}
	if (empty($mess)) {
		$err = '<div class="left_bot">'.$send_mail['empt'].'</div>';
		}

	if(!isset($err)){
		$sql = mysql_query("SELECT * FROM cont WHERE (id_ser = '$userid' AND id_ger = '$id_cont') OR (id_ser = '$id_cont' AND id_ger = '$userid')");
		$num = mysql_fetch_assoc($sql);

		if(!mysql_num_rows($sql)){
			###chua tung nt thi insert moi vao db 
			mysql_query("INSERT INTO `cont` SET `time` = '".time()."', `id_ser` = '$userid', `id_ger` = '$id_cont'");
			$mid = mysql_insert_id();
			mysql_query("INSERT INTO `messages` SET `time` = '".time()."', `id_ser` = '$userid', `id_ger` = '$id_cont', `msg` = '$mess', `cont` = '$mid'");
			header("Location: /mail/write$mid");
		} else {
			####da tung nt thi update
			mysql_query("UPDATE `cont` SET `time` = '".time()."' WHERE `id` = '$num[id]'");
			mysql_query("INSERT INTO `messages` SET `time` = '".time()."', `id_ser` = '$userid', `id_ger` = '$id_cont', `msg` = '$mess', `cont` = '$num[id]'");
			header("Location: /mail/write$num[id]");
		}

	} else {
		echo $err;
		echo '<a href="javascript:history.go(-1)">Quay Lại</a></div>';
				bk_foot();
		exit;
	}
}

?>
<form method="post">
<textarea name="messages"></textarea><br />
<input type="submit" class="submit" name="send" value="<?php echo $send_mail['send'];?>" />
</form></div>
<?php

bk_foot();