Hola,
Código PHP:
<?php
$hostname_con_md = "localhost";
$database_con_md = "nombre_db";
$username_con_md = "usuario_db";
$password_con_md = "pas_db";
$con_md = mysql_pconnect($hostname_con_md, $username_con_md, $password_con_md ) or trigger_error(mysql_error());
mysql_select_db($database_con_md,$con_md);
$sql = "SELECT * FROM tabla where condición";
$res= mysql_query($sql) or die (mysql_error());
while ($fila = mysql_fetch_array($res)) {
echo $fila['nombre_campo']."<br/>";
}
?>
saludos