decimal - PHP Scientific Notation Shortening -

i'm looking elegant solution here (if 1 exists).

i've got bunch of numbers, arbitrary amount of decimal places. want force number use 8 decimal places if it's got more 8 trailing zeroes i.e.

0.000000004321

that converted to:

0.00000001

but don't want use number format because if force 8 decimals number format numbers without 8 decimal places like:

1.00000000

i'd rather these (for amounts >= 1):

1.00700000 -> 1.01

and amounts < 1:

0.00300000 -> 0.003

if number less 1 i.e. 0.xx want have more precision (up 8, chopping off trailing 0's).

so, again, here's few examples make clear:

1.00300000  -> 1.01 (maintain , round 2p amounts >= 1) 0.00300000  -> 0.003 (maintaining precision, removing trailing 0's amounts < 1)  1.00300001  -> 0.01 (maintain , round 2dp amounts >= 1) 0.00300001  -> 0.00300001 (no change needed on this) 0.003000017 -> 0.00300002 (rounds upward 8dp because it's < 1)  1.000000002 -> 1.00 (maintain , round 2dp amounts >= 1) 0.000000002 -> 0.00000001 (rounds upward 8dp because it's < 1) 

at moment small numbers showing in scientific notation because of number of decimals. that's thing need worry (i.e. converting out of scientific notation calculations).

i know can bunch of generic logic, seems hacky way of doing things, surely there's nice solution this.

thank you.

to round upto 2nd place: ceil()

to remove ending zeros: rtrim()

if($number >= 1) {     ceil 2nd decimal place }  else //when number less 1 {     ceil 8th place     try rtrim '0' remove ending zeros if there }