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Re: too many matches regex [message #176665 is a reply to message #176661]

Mon, 16 January 2012 08:30

Curtis Dyer
Messages: 34
Registered: January 2011

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cate <catebekensail(at)yahoo(dot)com> wrote:

> $s = '1 2 20 - 31 55 56 77 - 88 97 - 99';
>
> $patRange = '/((\d+) *- *(\d+))/';

Remove the outermost parentheses. See below.

> $matches = array();
> preg_match_all($patRange, $s, $matches);
>
> I expected to see an array with 3 matches for each of the there
> number "ranges" found in the
> string $s (20 - 31, 20 and 31).... I see 4. Why? Need some
> insight from a jones. I don't understand what I'm seeing.
>
> Thank you.

In the matches returned, you have to account for the overall match
against the pattern itself. In this case, the outermost subpattern
is superfluous, since it yields the same result as the overall
match.

<snip print_r() output of the matches>

--
Curtis Dyer
<?$x='<?$x=%c%s%c;printf($x,39,$x,39);?>';printf($x,39,$x,39);?>

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[Message index]

		too many matches regex By: cate on Mon, 16 January 2012 05:33
		Re: too many matches regex By: Michael Fesser on Mon, 16 January 2012 08:08
		Re: too many matches regex By: Curtis Dyer on Mon, 16 January 2012 08:30

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