Fetch domain name from anchor tag value using regular expression in php

Question

I have below mix content in a php string.

<div class="biz-website">
    <span class="offscreen">Business website</span>
    <a target="_blank" href="/biz_redir?url=http%3A%2F%2Fwww.example.com&amp;src_bizid=LihgJyPNjlUB3euiFvfEgw&amp;cachebuster=1419609400&amp;s=112daf4cc534d37cbf02a548cb8cb1d15bbeba6fab83b74b1195640dc44c040e">example.com</a>
</div>

I need to fetch example.com from above php string. Any ideas on what I am doing wrong?

[Don't use regexes for parsing HTML](http://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags/1732454#1732454) — John Conde, Dec 26 '14 at 16:04
No I have not try but I know we can do this by using preg_match function — Lalit Sharma, Dec 26 '14 at 16:05
@LalitSharma: Actually, you can't do this with `preg_match` (well, you *can*, but you ***shouldn't***). — gen_Eric, Dec 26 '14 at 16:06
P.S. What do you mean by "what I am doing wrong"? We can't answer that question. You didn't show us what you are doing. — gen_Eric, Dec 26 '14 at 16:09

gen_Eric · Accepted Answer · 2014-12-26T16:20:59.950

2

Regex is not the right tool here. The correct tool is a DOM parser. I like PHP's DOMDocument.

$html = <<<END
<div class="biz-website">
    <span class="offscreen">Business website</span>
    <a target="_blank" href="/biz_redir?url=http%3A%2F%2Fwww.example.com&amp;src_bizid=LihgJyPNjlUB3euiFvfEgw&amp;cachebuster=1419609400&amp;s=112daf4cc534d37cbf02a548cb8cb1d15bbeba6fab83b74b1195640dc44c040e">example.com</a>
</div>
END;

$DOM = new DOMDocument;
$DOM->loadHTML($html);

$aTags = $DOM->getElementsByTagName('a');

$value = $aTags->item(0)->nodeValue;
echo $value;

UPDATE: If you want to see if the href contains "biz_redir", then you can just simply check that:

$html = <<<END
<div class="biz-website">
    <span class="offscreen">Business website</span>
    <a target="_blank" href="/biz_redir?url=http%3A%2F%2Fwww.example.com&amp;src_bizid=LihgJyPNjlUB3euiFvfEgw&amp;cachebuster=1419609400&amp;s=112daf4cc534d37cbf02a548cb8cb1d15bbeba6fab83b74b1195640dc44c040e">example.com</a>
</div>
END;

$DOM = new DOMDocument;
$DOM->loadHTML($html);

$aTags = $DOM->getElementsByTagName('a');
$aTag = $aTags->item(0);

if(strpos($aTag->getAttribute('href'), 'biz_redir') !== FALSE){
    $value = $aTag->nodeValue;
    echo $value;
}

UPDATE 2: If you don't just have that clip, but the entire webpage, then you can find the <div> you want like this:

$DOM = new DOMDocument;
$DOM->loadHTML($html);
$xPath = new DOMXPath($DOM);

$biz = $xPath->query('//div[@class="biz-website"]/a[contains(@href, "biz_redir")]');

$value = $biz->item(0)->nodeValue;
echo $value;

edited Dec 26 '14 at 16:20

answered Dec 26 '14 at 16:07

gen_Eric

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I want to check also if anchor tag's href contains biz_redir then only we have to fetch its value which is between example.com – Lalit Sharma Dec 26 '14 at 16:09
1

@LalitSharma: You can check the `href` attribute, too. I'll add that in the answer. (P.S. Try to say what you want upfront) – gen_Eric Dec 26 '14 at 16:10
I want to fetch address from http://www.yelp.com/biz/h-und-m-wien-4 you can find that website written under the contact number which is "hm.com" using php – Lalit Sharma Dec 26 '14 at 16:12
@LalitSharma: OH! Well, then you might need to loop over all the `` tags to find the one with `"biz_redir"`. Or, actually, there's a `
`. If you search for that, then you can easily get the ``.
– gen_Eric Dec 26 '14 at 16:16
@LalitSharma: Do you have just the string you show in the question, or do you have the *entire* page that you want to search in? – gen_Eric Dec 26 '14 at 16:17
I am going to use file_get_contents php function to get whole page's html and then will fetch values i required – Lalit Sharma Dec 26 '14 at 16:19
@LalitSharma: You can actually have DOMDocument get the page for you, instead of using `file_get_contents`. Replace `$DOM->loadHTML($html);` with `$DOM->load('http://www.yelp.com/biz/h-und-m-wien-4');` :-) – gen_Eric Dec 26 '14 at 16:24
I have try but its giving me null – Lalit Sharma Dec 27 '14 at 04:51
Thanks buddy working greate :) – Lalit Sharma Dec 27 '14 at 06:08

Fetch domain name from anchor tag value using regular expression in php

1 Answers1