Php function to extract hyperlink from string

Question

I need the function for extract link from html string. Example:

String:

<!-- BEGIN PARTNER PROGRAM - DO NOT CHANGE THE PARAMETERS OF THE HYPERLINK -
-> <a href='http://www.link.com' target='_blank'>text</a> <img 
src='http://www.linkimage.com' BORDER='0' WIDTH='1' HEIGHT='1' /> <!-- END 
PARTNER PROGRAM -->

need to extract:

http://www.link.com

Thx

https://www.mkyong.com/regular-expressions/how-to-extract-html-links-with-regular-expression/ — mic, Nov 03 '17 at 09:18
Fails the obligatory "what have you tried and where are you stuck?" question... hint: don't use a [RegExp](https://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags/1732454#1732454) but [DOMDocument](http://php.net/manual/en/class.domdocument.php) — CD001, Nov 03 '17 at 09:19

Teo Mihaila · Accepted Answer · 2017-11-03T09:43:13.887

0

$string = "<!-- BEGIN PARTNER PROGRAM - DO NOT CHANGE THE PARAMETERS OF THE HYPERLINK -
-> <a href='http://www.link.com' target='_blank'>text</a> <img 
src='http://www.linkimage.com' BORDER='0' WIDTH='1' HEIGHT='1' /> <!-- END 
PARTNER PROGRAM --> ";

    $link = explode('<a href=\'', $string)[1];
    $link = explode('\'',$link)[0];
    echo $link;

    $linkimage = explode('src=\'', $string)[1];
    $linkimage = explode('\'',$linkimage)[0];
    echo $linkimage;

edited Nov 03 '17 at 09:43

answered Nov 03 '17 at 09:19

Teo Mihaila

134
1
2
18

If there's an `` tag in there like `...` this will fail. – CD001 Nov 03 '17 at 09:25
@Pau Do you want to do this for multiple different strings? It is important if the other string have the exact same pattern. The code for extraction is based on the pattern. To obtain linkimage: replace the first parameter in explode with `src=\'` and the seconds stays the same. – Teo Mihaila Nov 03 '17 at 09:32
The string have always same pattern – Pau Nov 03 '17 at 09:33
@CD001 If the string always have this pattern, it'll work – Teo Mihaila Nov 03 '17 at 09:34
@Pau if this was correct, you should mark it as the correct answer – Teo Mihaila Nov 03 '17 at 09:37
@TeoMihaila donde ! How could i extract from same srting `http://www.linkimage.com` – Pau Nov 03 '17 at 09:40
@Pau Check the answer. I have modified it – Teo Mihaila Nov 03 '17 at 09:41

acidofil · Answer 2 · 2017-11-03T18:19:56.590

the quick n dirty way:

preg_match_all('~href=([\'"])([^\'"]+)\\1~is', $htmlString, $matches); 

print_r($matches[2]);

the proper way:

http://php.net/manual/en/domdocument.getelementsbytagname.php / http://php.net/manual/en/simplexmlelement.xpath.php and so on..

Problem with proper way is that you need to tidy the html before parsing. In some cases even the php native http://php.net/manual/en/book.tidy.php fails to do that correctly.

Php function to extract hyperlink from string

2 Answers2