Adding class to links and finding links

[eeart]

I have 2 regex questions related to hyperlinks:

 

1. I am trying to add a class to hyperlinks with a certain URL. What I have now is this:

 

$pattern = "/<a href=[\'\"](" . $url . ")[\'\"]>(.*)<\/a>/is";
$replace = "<a href=\"$1\" class=\"". $class_name ."\">$2</a>";
$html = preg_replace($pattern, $replace, $html);

 

But this only works if the original <a> tag has no special attributes, such as an id, style, target, title or another class.

If it already has a class I want to replace it with my new class.

 

2. To find all hyperlinks in a text I am using the following preg_match_all:

 

preg_match_all(
'#<a\s
    		(?= [^>]* href="   (?P<href>  [^"]*) ")|)
    	(??= [^>]* title="  (?P<title> [^"]*) ")|)
    	(??= [^>]* class="  (?P<class> [^"]*) ")|)
    		(??= [^>]* target=" (?P<target>[^"]*) ")|)
    		[^>]*>
    		(?P<text>[^<]*)
    		</a>
  		#xi',
$html,
  	$matches,
  	PREG_SET_ORDER
);

 

This works well, but it doesn't find links with single quotes. So it'll find <a href="something"> but not <a href='something'>

 

Can someone help me with this? I have been struggling with this for a while. Thank you.

[sasa]

1.

<?php
$class_name = 'my_class';
$html = '<a id="23" href="sa\'sa.com" class="yyy" bla bla>xx</a>';
$pattern1 = '/(<a [^>]*) class=([\'"])[^\2]+\2([^>]*>)/is';
$replace1 = '\1\3';
$pattern2 = '/(<a [^>]*href=([\'"])[^\2]+\2)([^>]*)/is';
$replace2 = '\1 class="'. $class_name .'"\3';

$html = preg_replace($pattern1, $replace1, $html);
echo $html = preg_replace($pattern2, $replace2, $html);
?>

[eeart]

Thank you sasa, but I don't want to remove all existing classes and I only want to add the new class to hyperlinks with a specific URL. The purpose is to mark hyperlinks with a broken or bad URL.

 

So for example a text may have 20 hyperlinks and I only want to add a class "broken_link" to all hyperlinks with URL http://www.badlink.com

[johnny86]

Maybe you shoud consider using simplehtmldom for that?

[eeart]

Maybe you shoud consider using simplehtmldom for that?

 

That HTML Dom Parser is brilliant! Thank you so much, johnny86. This does exactly what I need! 

[sasa]

change $pattern2 to

$pattern2 = '/(<a [^>]*href=([\'"])'. $url . '\2)([^>]*)/is';