repeat if echo prints something?

[BRADERY]

echo "\n::: ACCOUNTS RETREIVED, BEGIN TOP MOBBING, SENDING ENERGY and REMOVING :::\n";
$iMobLink="http://mob-dynamic-lb".rand(1,5).".mobsters0".rand(1,9).".com/mob/";
for($i=0; $i!=count($iAccountData); $i++)
{
  echo "\n::: ".strtoupper($iAccountData[$i][0])." :::\n";
  if($iAccountData[$i][1] != "" && stristr($iAccountData[$i][0], "@") && stristr($iAccountData[$i][0], "."))
  {
    list($iStore[0],$iStore[1],$iStore[2],$iStore[3]) = iAuthorize($iAccountData[$i], $iMobLink);
    if($iStore[2] > 1 && strlen($iStore[3]) == 40)
    {
      $iReward = file_get_contents($iMobLink."top_mob_gift_all?user_id=".$iStore[2]."&auth_key=".$iStore[3]);
      xml_parse_into_struct($iP=xml_parser_create(), $iReward, $iS, $iX);xml_parser_free($iP);
      echo "1: ".strip_tags(str_replace("<br>","\n",$iS[$iX['MESSAGE'][0]]['value']))."\n";
    }
    else echo "Account Skipped: wrong password/email combo, or a login error...\n";
  }
  else echo "Account Skipped: invalid email or blank password...\n";
}
echo "\n::: PROGRAM FINISHED, YOU CAN CLOSE THIS AT ANY TIME :::";
sleep(10000);

 

how could I make this whole thing repeat if echo reads "You weren't able to".. I just want it to retry this

 

      $iReward = file_get_contents($iMobLink."top_mob_gift_all?user_id=".$iStore[2]."&auth_key=".$iStore[3]);
      xml_parse_into_struct($iP=xml_parser_create(), $iReward, $iS, $iX);xml_parser_free($iP);
      echo "1: ".strip_tags(str_replace("<br>","\n",$iS[$iX['MESSAGE'][0]]['value']))."\n";

 

if echo prints "Your weren't able to".. What do I have to add?

[premiso]

Use Output Buffering (ob_start, ob_get_clean) then do a preg_match or strpos for the string, if that is there then repeat.