Globals or Super Global Variables To Be Reused from For Loops

[Alice Wei <ajwei@xxxxxxxxxxxxx>]

Hi, 

I have a snippet of code as shown in the following:

$message2="47406|Detroit";
$stringChunk2= explode("|", $message2);

 if ($message2!="") {
   $count_chunk2= count($stringChunk2);
   $count_chunk_2= $count_chunk2-1;
}

   for ($j=0; $j<$count_chunk2; $j++) {

          $string3= $stringChunk2[$j];       
      if ($j <$count_chunk_2) {
         $string2= " OR ";
         $string3=$string3.$string2;
   }
     else {
         //Don't do anything
   }
       echo $string3;
  }

The code itself works, but I would like to reuse $string3 variable somewhere else where I can build SQL statements from it. 
I tried using 

global $string3; 
echo $string3;

after the final curly brace, but I only get Detroit and not "47406 OR Detroit". Can anyone please suggest me what I should be using here?

Thanks for your help.

Alice

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