CODEWITHSUNDEEP
phpregex
markmb
markmb

Reputation: 892

Search for multiple patterns inside a pattern

I'm using regular expressions to extract data from a website, but now I found a problem.

This is part of the original HTML that I want to parse. I want to extract the text after "descuentos-" and the city, after the "<a href>".

<div id="cities2_2">
  <a href = "http://website.com/descuentos-espana/">Badajoz</a>
  <a href = "http://website.com/descuentos-espana/">Badalona</a>
  <a href = "http://website.com/descuentos-barcelona/">Barcelona</a>
  <a href = "http://website.com/descuentos-bilbao/">Bilbao</a>
  <a href = "http://website.com/descuentos-espana/">Burgos</a>
</div>
</div>
<div class="capa_cities" onmouseover="act_formato(3, 2);"
     onmouseout="desact_formato(3, 2);">
<h2 id="title_city3_2">C</h2>
<div id="cities3_2">
  <a href = "http://website.com/descuentos-espana/">Cáceres</a>
  <a href = "http://website.com/descuentos-cadiz/">Cádiz</a>
  <a href = "http://website.com/descuentos-espana/">Cartagena</a>
  <a href = "http://website.com/descuentos-espana/">Castellón</a>
  <a href = "http://website.com/descuentos-espana/">Ceuta</a>
  <a href = "http://website.com/descuentos-espana/">Ciudad Real</a>
  <a href = "http://website.com/descuentos-cordoba/">Córdoba</a>
  <a href = "http://website.com/descuentos-espana/">Cuenca</a>

I could look for <a href = "http://website.com/descuentos-(.*)">, but there are others that match the pattern in the website. So I now have this pattern:

#<div id="cities[0-9]+_2">(<a href = "http://website.com/descuentos-(.*?)/">(.*?)</a>)*#

I'd like to have it recursive. I mean: for each "<a href = "http://website.com/descuentos-(.* )/">(.*)</a>" found, search for the two small patterns inside.

Is there a way to achieve this in regex, or I have to reprocess it through preg_match_all?

Upvotes: 1

Views: 135

Answers (1)

aleation
aleation

Reputation: 4834

Option 1 : quick way: Yes, use preg_match_all()

preg_match_all('#<a href = "http://website.com/descuentos-(.*?)/">.*?</a>#', $str, $matches);

echo "<pre>";
print_r($matches);
echo "</pre>";

returns:

Array
(
    [0] => Array
        (
            [0] => Badajoz
            [1] => Badalona
            [2] => Barcelona
            [3] => Bilbao
            [4] => Burgos
            [5] => Cáceres
            [6] => Cádiz
            [7] => Cartagena
            [8] => Castellón
            [9] => Ceuta
            [10] => Ciudad Real
            [11] => Córdoba
            [12] => Cuenca
        )

    [1] => Array
        (
            [0] => espana
            [1] => espana
            [2] => barcelona
            [3] => bilbao
            [4] => espana
            [5] => espana
            [6] => cadiz
            [7] => espana
            [8] => espana
            [9] => espana
            [10] => espana
            [11] => cordoba
            [12] => espana
        )

    [2] => Array
        (
            [0] => Badajoz
            [1] => Badalona
            [2] => Barcelona
            [3] => Bilbao
            [4] => Burgos
            [5] => Cáceres
            [6] => Cádiz
            [7] => Cartagena
            [8] => Castellón
            [9] => Ceuta
            [10] => Ciudad Real
            [11] => Córdoba
            [12] => Cuenca
        )

)

Time elapsed: 0.000104904174805

Option 2: DOM Parser: ($str is your text);

$dom = new DomDocument();
$dom->loadHTML($str);

$links = $dom->getElementsByTagName('a');

foreach($links as $link){
    $href = $link->getAttribute('href');

    echo $href." ### ";//prints the href
    preg_match('#descuentos-(.*)/#', $href, $match);
    echo $link->nodeValue." - ".$match[1]."<br/>";
}

Output (add the utf-8 headers to see the correct chars):

http://website.com/descuentos-espana/ ### Badajoz - espana
http://website.com/descuentos-espana/ ### Badalona - espana
http://website.com/descuentos-barcelona/ ### Barcelona - barcelona
http://website.com/descuentos-bilbao/ ### Bilbao - bilbao
http://website.com/descuentos-espana/ ### Burgos - espana
http://website.com/descuentos-espana/ ### Cáceres - espana
http://website.com/descuentos-cadiz/ ### Cádiz - cadiz
http://website.com/descuentos-espana/ ### Cartagena - espana
http://website.com/descuentos-espana/ ### Castellón - espana
http://website.com/descuentos-espana/ ### Ceuta - espana
http://website.com/descuentos-espana/ ### Ciudad Real - espana
http://website.com/descuentos-cordoba/ ### Córdoba - cordoba
http://website.com/descuentos-espana/ ### Cuenca - espana
Time elapsed: 0.000319004058838

Upvotes: 2

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