$SQL3 = "Select username from uyeler where onay=1";
$Sorgula3 = @mysql_query( $SQL3 );
while ($kat = @mysql_fetch_array($Sorgula3)){
$userkontrol[] = $kat['username'];  
}

    $arrayToJs = array();
    $arrayToJs[0] = $validateId;
    $arrayToJs[1] = $validateError;
    
if(in_array($validateValue, $userkontrol)){        // validate??
    $arrayToJs[2] = "true";            // RETURN TRUE
    echo '{"jsonValidateReturn":'.json_encode($arrayToJs).'}';            // RETURN ARRAY WITH success
}else{
    for($x=0;$x<1000000;$x++){
        if($x == 990000){
            $arrayToJs[2] = "false";
            echo '{"jsonValidateReturn":'.json_encode($arrayToJs).'}';        // RETURN ARRAY WITH ERROR
        }
    }
    
}