- explode: documentation ( source)
- trim: documentation ( source)
<?php
$argv[1] = '-040.010';
$argv[1] = '-0000100.123400000';
$_=$argv[1];$t=trim('-'==$_[0]?$n=$_=trim($_,'-'):$_,0);
$t=trim('-'==($_=$argv[1])[0]?$n=$_=trim($_,'-'):$_,0);
$R = explode('.',$t);
echo strlen($R[1]).($t!==$_?($n?' -':' ').$t:'');