GET and Server Validation

<?php 
if ("" == "")  {
  $WAFV_Redirect = "restricted.php";
  $_SESSION['WAVT_login_375_Errors'] = "";
  if ($WAFV_Redirect == "")  {
    $WAFV_Redirect = $_SERVER["PHP_SELF"];
  }
  $WAFV_Errors = "";
  $WAFV_Errors .= WAValidateLE($_GET['login'] . "",false . "",false,6);

  if ($WAFV_Errors != "")  {
    PostResult($WAFV_Redirect,$WAFV_Errors,"login_375");
  }
}
?>
<?php 
if (isset($_POST["buttonLogin"]) || isset($_POST["buttonLogin_x"]))  {
  $WAFV_Redirect = "login.php";
  $_SESSION['WAVT_login_093_Errors'] = "";
  if ($WAFV_Redirect == "")  {
    $WAFV_Redirect = $_SERVER["PHP_SELF"];
  }
  $WAFV_Errors = "";
  $WAFV_Errors .= WAValidateRX(((isset($_POST["title"]))?$_POST["title"]:"") . "","/^$/i",false,1);
  $WAFV_Errors .= WAValidateEM(((isset($_POST["username"]))?$_POST["username"]:"") . "",true,2);
  $WAFV_Errors .= WAValidateAN(((isset($_POST["password"]))?$_POST["password"]:"") . "",true,true,true,false,"üöäßÜÖÄ_-$§&#*€@",true,3);
  $WAFV_Errors .= WAValidateEL(((isset($_POST["password"]))?$_POST["password"]:"") . "",6,50,true,4);  
  $WAFV_Errors .= WAValidateRX(((isset($_POST["product"]))?$_POST["product"]:"") . "","/^$/i",false,5);

  if ($WAFV_Errors != "")  {
    PostResult($WAFV_Redirect,$WAFV_Errors,"login_093");
  }
}
?>
<?php
if(isset($_POST["buttonLogin"]) || isset($_POST["buttonLogin_x"])){
	$WA_Auth_Parameter = array(
	"connection" => $Localhero,
	"database" => $database_Localhero,
	"tableName" => "members",
	"columns" => explode($WA_Auth_Separator,"username".$WA_Auth_Separator."password".$WA_Auth_Separator."flag"),
	"columnValues" => explode($WA_Auth_Separator,"".strtoupper(((isset($_POST["username"]))?$_POST["username"]:""))  ."".$WA_Auth_Separator."".WA_CryptEncryption(((isset($_POST["password"]))?$_POST["password"]:""))  ."".$WA_Auth_Separator."1"),
	"columnTypes" => explode($WA_Auth_Separator,"text".$WA_Auth_Separator."text".$WA_Auth_Separator."int"),
	"sessionColumns" => explode($WA_Auth_Separator,"id".$WA_Auth_Separator."flag"),
	"sessionNames" => explode($WA_Auth_Separator,"memberID".$WA_Auth_Separator."memberLevel"),
	"successRedirect" => "members/diver.php",
	"failRedirect" => "login.php?login=false",
	"gotoPreviousURL" => FALSE,
	"keepQueryString" => FALSE
	);
	
	WA_AuthenticateUser($WA_Auth_Parameter);
}
?>

$WAFV_Errors .= WAValidateLE($_GET['login'] . "",false . "",false,6);

$WAFV_Errors .= WAValidateLE($_GET['login'] . "", "false",false,6);