How can i remove link using regex in php?

Question

I want to remove all links which matched this domain vnexpress.net in href attribute. This is a link example:

<a href="http://vnexpress.net/whatever">whatever</a>

This is my code:

$contents = preg_replace('/<a\s*href=\"*vnexpress*\"\s(.*)>(.*)<\/a>/', '', $data->content);

Please help me! Thank you so much!.

@AvinashRaj i tried to use your code but it was not working. — Duy Nguyen
– Duy Nguyen, Commented Jan 16, 2015 at 4:51
try this '~<a\s*href="[^"]*?\bvnexpress.net\b[^"]*"\s*>([^<>]*)<\/a>~' — Avinash Raj
– Avinash Raj, Commented Jan 16, 2015 at 4:53
@AvinashRaj it's still not working. The links were still existed. — Duy Nguyen
– Duy Nguyen, Commented Jan 16, 2015 at 5:04

hwnd · Accepted Answer · 2015-01-16 05:00:39Z

2

You've asked for a regular expression here, but it's not the right tool for parsing HTML.

$doc = new DOMDocument;
$doc->loadHTML($html); // load the html

$xpath = new DOMXPath($doc);
$links = $xpath->query("//a[contains(@href, 'vnexpress.net')]");

foreach ($links as $link) {
   $link->parentNode->removeChild($link);
}

echo $doc->saveHTML();

answered Jan 16, 2015 at 5:00

hwnd

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Ahosan Karim Asik · Accepted Answer · 2015-01-17 06:06:02Z

0

Try this:

$re = "/<a[^>]+href=\"[^\"]*vnexpress.net[^>]+>(.*)<\\/a>/m";
$str = "<a id=\"\" href=\"http://vnexpress.net/whatever\">whatever <b>sss</b> </a>\n<a id=\"\" href=\"http://new.net/whatever\">whatever</a>\n";
$subst = "$1";

$result = preg_replace($re, $subst, $str);

Live demo

edited Jan 17, 2015 at 6:06

answered Jan 16, 2015 at 5:47

Ahosan Karim Asik

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4 Comments

Ahosan Karim Asik Over a year ago

@Duy Nguyen If this answer works for your condition, then you may accept this answer..

Casimir et Hippolyte Over a year ago

This pattern will fail (because of the use of .*) in this kind of situation: <a href="">text</a><a href="http://vnexpress.net/whatever">text</a>

Duy Nguyen Over a year ago

@CasimiretHippolyte can you improve it? and can you explain more (.*), please. I am new in regex, so i don't understand what it mean.

Ahosan Karim Asik Over a year ago

@CasimiretHippolyte Yes, it will be /<a[^>]+href=\"[^\"]*vnexpress.net[^>]+>(.*)<\\/a>/m.. thanks a lot..

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