1 
     $arr[$mid]){46             $low = $mid+1;47         }48         $mid = floor(($low+$high)/2);49     }50     return $val==$arr[$mid]?$mid:-1;51  }52  53  $arr = array(9,6,10,2,5,3,1,8);54  echo seq_search($arr,8,2);55  echo '
';56  echo binary_search_recursive($arr,0,7,2);57  echo '
';58  echo binary_search($arr,0,7,2);59