"; for ($i = 0; $i< 24; $i++) { if ($i < 10) {$hourStr = "0".$i;} else {$hourStr = "".$i;} $retstr .= "".$hourStr.""; } $retstr .= ":"; $retstr .= ""; for ($i = 0; $i< 60; $i++) { if ($i < 10) {$minuteStr = "0".$i;} else {$minuteStr = "".$i;} $retstr .= "".$minuteStr.""; } $retstr .= ":"; $retstr .= ""; for ($i = 0; $i< 60; $i++) { if ($i < 10) {$secondStr = "0".$i;} else {$secondStr = "".$i;} $retstr .= "".$secondStr.""; } $retstr .= ""; echo $retstr; ?>