A helper to play with SQL queries

SQL_helper.php

<?php
//Good to use in PHP pure reports, can send some GET params and automatically filter query with them
function addWhere()
{
  if (isset($_REQUEST) && count($_REQUEST) > 0){
      $where = ' WHERE ';
      foreach ($_REQUEST as $column => $value) {
          if (is_numeric($value)){
            $where .= " $column = $value ";
          } else {
            $where .= " $column = '{$value}' ";
          }
      }
  } else {
     $where = '';
  }
  return $where;
}