On Wednesday 07 February 2001 21:50, Michael Dearman wrote:
> > }
> > elseif( preg_match( "/^\d+$/", $arg[$i], $matches ) )
>
> Isn't this \d+ matching ----------^
>
> > {
> > $value = $matches[0];
> > }
> > elseif( preg_match( "/(div\d|prem)/", $arg[$i], $matches ) )
>
> the \d in this-----------------^------------^
No. the 1st expression is /^\d+$/ , i.e. match strings with at least one
decimal number and nothing else (\d+) from their beginning (^) to their
end ($)
I.e. that one only catches strings consisting only of decimal digits.
> And the | is using '\d' and 'prem'. It probably should be
> "/(div\d)|prem/ Unless those parens are part of the expression. Then
No, that's fine.
(div\d|prem)
means "match either 'div\d' or 'prem'" and memorize that part
--
Christian Reiniger
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