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function flagSet ( $flags, $f, $v ) {#-k flags#- put the value '$v' into the '$f'th place if (($f < 1) or ($f > 49)) return $flags; $flg = str_split ( $flags ); for ($i=$flg[0]+1;$i<$f;$i++) # fill in any gaps before $f for implode if (!isset($flg[$i])) $flg[$i] = '-'; $flg[$f] = $v; $flg[0] = max ( $flg[0], $f ); $flags = implode ( $flg ); return $flags; }?>