Random ID/Number Generator in PHP

Question

I am building a list of \"agent id\'s\" in my database with the following requirements:

1. The ID must be 9 digits long (numeric only)
2. The ID may not con

Answer 1

The first solution that comes to mind is a recursive function that simply tests your three requirements and restarts if any three of them fail. Not the most efficient solution but it would work. I wrote an untested version of this below. May not run without errors but you should get the basic idea from it.

function createRandomAGTNO(){
  srand ((double) microtime( )*1000000);
  $random_agtno = rand(100000000,900000000);

  $random_agtno_array = explode('', $random_agtno);

  foreach($random_agtno_array as $raa_index => $raa){
    if($raa == $random_agtno_array[$raa_index + 1] && raa == $random_agtno_array[$raa_index + 2]) createRandomAGTNO();

    $dup_match = array_search($raa, $random_agtno_array);
    if($dup_match){
      unset($random_agtno_array[$dup_match]);
      if(array_search($raa, $random_agtno_array)) createRandomAGTNO();
    };
  }

  return $random_agtno;
}