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Re: too many matches regex [message #176663 is a reply to message #176661]

Mon, 16 January 2012 08:08

Michael Fesser
Messages: 215
Registered: September 2010

Karma:

Senior Member

.oO(cate)

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

The results of the preg_match_* functions always contain a full pattern
match at the [0] index. The matches from the parentheses then start at
index [1]. Since you've parenthesized the entire pattern, you'll see
that result twice.

Micha

--
http://mfesser.de/blickwinkel

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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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