preg_match_all

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Subject

Author

Date

preg_match_all

Anthony Smith

05-31-2008

Rik Wasmus

AnrDaemon

AnrDaemon

Posted by Anthony Smith on May 31, 2008, 10:49 am

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I am trying to take a web page and get all of the links. It almost
works, but I am missing a few links.
Here is what I am using.
preg_match_all('/href=[\"\']?([^\"\'>]*)[\"\']?[^>]*>(.*?)<\/a>/i',
$s,$matches,PREG_SET_ORDER);

It will not pick up links like this:

<a class="highlight" href="browse.php?region=West
+Tennessee&zips=38115&mgrp=13&p=2">
Next >
</a>

How do I get it to pickup hrefs like the one above?

Posted by Rik Wasmus on May 31, 2008, 11:08 am

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=

wrote:

> I am trying to take a web page and get all of the links. It almost

> works, but I am missing a few links.

> Here is what I am using.

> preg_match_all('/href=3D[\"\']?([^\"\'>]*)[\"\']?[^>]*>(.*?)<\/a>/i',

> $s,$matches,PREG_SET_ORDER);

> It will not pick up links like this:

> <a class=3D"highlight" href=3D"browse.php?region=3DWest

> +Tennessee&zips=3D38115&mgrp=3D13&p=3D2">

> Next >

> </a>

> How do I get it to pickup hrefs like the one above?

Add the /s modifier
-- =

Rik Wasmus
...spamrun finished

Posted by AnrDaemon on June 4, 2008, 3:00 pm

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Greetings, Rik Wasmus.
In reply to Your message dated Saturday, May 31, 2008, 19:08:16,

>> I am trying to take a web page and get all of the links. It almost

>> works, but I am missing a few links.

>> Here is what I am using.

>> preg_match_all('/href=[\"\']?([^\"\'>]*)[\"\']?[^>]*>(.*?)<\/a>/i',

>> $s,$matches,PREG_SET_ORDER);

>> It will not pick up links like this:

>> <a class="highlight" href="browse.php?region=West

>> +Tennessee&zips=38115&mgrp=13&p=2">

>> Next >

>> </a>

>> How do I get it to pickup hrefs like the one above?

> Add the /s modifier

That would work, after some deeper think about it...
But I wish to offer a bit different approach:

preg_match_all('#href=(?:([\"\'])([^\"\'>]\S*?)[^>]*|([^>\"\']+))>(.*?)</a>#is',
$s, $matches, PREG_SET_ORDER);

It have one downside: your URL will be in (2) or (3) depends on the quotes
around URL.
So you must pull result with construction like

$url_link = empty($matches[N][3]) ? $matches[N][2] : $matches[N][3];
$url_text = $matches[N][4];

--

Posted by AnrDaemon on June 6, 2008, 6:44 am

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Greetings, AnrDaemon.
In reply to Your message dated Wednesday, June 4, 2008, 23:00:34,

preg_match_all('#href=(?:([\"\'])([^\"\'>]\S*?)[^>]*|([^>\"\']+))>(.*?)</a>#is',
$s, $matches, PREG_SET_ORDER);

Regexp should be spelled as
'#href=(?:([\"\'])([^\"\'>]\S*?)|([^>\"\'\s]+))[^>]*>(.*?)</a>#is'

--

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