//Connection vars set correctly above this line
$link = mysql_connect($dbHost,$dbUser,$dbPass) or die("Unable to connect to database");
mysql_select_db("$dbName") or die("Unable to select database $dbName");

$sqlquery = "select text1, text2 ".
            "from myTable ".
            "where selectValue='".mysql_real_escape_string($_POST['selectValue'])."'";

$results = mysql_query($sqlquery) or die('Query failed: ' . mysql_error());;

if ($row = mysql_fetch_assoc($results)){
  //put results in value of inputs
  echo "<input type='text' id='text1' name='text1' value='".$row['text1']."' />";
  echo "<input type='text' id='text2' name='text2' value='".$row['text1']."' />";
} else {
  //since there was no result, show empty inputs
  echo "<input type='text' id='text1' name='text1' />";
  echo "<input type='text' id='text2' name='text2' />";
}

mysql_close($link);