Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource

   $lon_query=mysql_query("select long from cities where id_city='1'");
   $lon_result=mysql_fetch_array($lon_query);

$sql = mysql_connect('127.0.0.1','login','password');
mysql_select_db('basename',$sql);
$lon_query=mysql_query("select long from cities where id_city='1'",$sql);
$lon_result=mysql_fetch_array($lon_query);

<?php 
$sql = "select * from users where username='".$_POST["name"]."'"; 
$result = mysql_query($sql); 
if(!$result) 
{ 
  echo "Возникла ошибка - ".mysql_error()."<br>"; 
  echo $sql; 
  exit(); 
} 
// Далее остальной код 
?>

<?php
 
 
/// Здесь настройки подключения к БД
$bd_host = "localhost";
 
$bd_user     = "obmen"; // - логин
$bd_password = "obmen"; // - пароль
$bd_base     = "obmen"; // - имя базы
 
 
mysql_connect($bd_host, $bd_user, $bd_password) or die(mysql_error());
mysql_select_db($bd_base);
 
 
// параметры
$conf = mysql_query("SELECT * FROM Settings where s='1' limit 1");  
 
$cr=mysql_fetch_assoc($conf);
 
 
$SITENAME  = $cr['sitename'];
$SITENAME  = str_replace('+',"<br>",$SITENAME);
 
$SITED     = $cr['domen'];
$SITEDESC  = $cr['description'];
$SITEKEYW  = $cr['keywords'];
$SEC       = $cr['seconds'];
?>

die(var_dump($conf));

$conf = mysql_query("SELECT * FROM Settings where s='1' limit 1");

echo mysql_error();

<?
 
$db = mysql_connect("localhost","alex","a123b");
 
mysql_query("SET NAMES cp1251");
 
mysql_select_db("first",$db);
 
$result = mysql_query("SELECT * FROM table", $db);
echo mysql_error();
$myrow = mysql_fetch_array($result);
 
do
{
echo "<tr class=''>";
echo "<td class='nom'>№".$myrow["id"]."</td>";
echo "<td class='nam'>".$myrow["name"]."</td>";
echo "<td class='o'><a href='#'>Текст</a></td>";
echo "<td></td>";
echo "<td></td>";
echo "<td></td>";
echo "<td></td>";
echo "</tr>";
}
while($myrow = mysql_fetch_array($result));
 
?>

<?php
 
include ('db.php');
 
$id = $_GET['id'];
$type = $_GET['type'];
 
$query = mysql_query("SELECT * FROM $type WHERE id='$id' ");
$result = mysql_query($query);
$myrow = mysql_fetch_array($result);
 
 
 
 
?>
 
<table border="1">
 
<tr>
<th>Назва</th>
<td width="100"><? echo $myrow['zagol']?></td>
</tr>
 
<tr>
<th>Цена</th>
<td><? echo $myrow['price'] ?></td>
</tr>
 
<tr>
<th>Опис</th>
<td><? echo $myrow['text'] ?></td>
</tr>
 
 
 
</table>

if (!$result) {
  echo mysql_error();
  exit();
}