STR Replace

[a1amattyj]

Hello,

 

I'm trying to convert a paragraph of text which is already html formatted.

 

I wish to find keywords, such as, 'PHP', which are contained in the paragraph, and replace them with a link, for example <a href="http:/www...">PHP</a>

 

str_replace('PHP', '<A href=""....">PHP</a>', $content);

 

 

My problem arises when some of these keywords are already contained in a link, so say, visit PHP website, is all one link, so str_replace would simply convert the PHP in this string, to two links for one single word.

 

<a href="">visit <A href=""....">PHP</a> website</a>

How could this problem be resolved?

 

Thanks

 

[BlueSkyIS]

you'll probably need something fancier like preg_replace. an example, replacing php if not already in a link:

 

$string1 = "hello world php is great.";
$string2 = "hellow world <a href='http://www.cnn.com'>php</a> is great.";

$replace_link = "<a href='http://www.yahoo.com'>php</a>";
$pattern = '/([^>])php([^<])/';

$string1 = preg_replace($pattern, '$1'.$replace_link.'$2', $string1);
$string2 = preg_replace($pattern, '$1'.$replace_link.'$2', $string2);

echo "string1: $string1 <br />";
echo "string2: $string2 <br />";