<?php
$arra2 = '';
Switch($arra2) {
case 1;
$smt = $con->prepare("SELECT * FROM tuser WHERE :NOMBR1 LIKE :ARR1");
break;
case 2;
$smt = $con->prepare("SELECT * FROM tuser WHERE :NOMBR2 LIKE :ARR1");
break;
case 3;
$smt = $con->prepare("SELECT * FROM tuser WHERE :NOMBR3 LIKE :ARR1");
break;
case 4;
$smt = $con->prepare("SELECT * FROM tuser WHERE :NOMBR4 LIKE :ARR1");
break;
default: "Must select one of the Categorys";
}