[RESOLVED] String Replacement

[zbee]

I made a search engine, and now I'd like to do a search by keyword, and show the results highlighting the keyword. I have this:

$string = "This is a test, but this will be...";
$keyword = "this";
$new_string = eregi_replace($keyword, "<strong>$keyword</strong>", $string );

Now, my problem is that I don't need to change the keyword, I just need to add the "strong" tags to it. In this example the new string changes the first "This" to lower-case, which is not what I want.
Any suggestions? 🙁

[jazz_snob]

eregi_replace is case-insensitive, so $keyword="this" matches "This" --- then it replaces it.

This works using preg_replace...

$str = "This is a test, but this will be...";
$keyword = "this";

$new_string = preg_replace( "/($keyword)/i", "<strong>\$1</strong>", $str );

[zbee]

Thank you so much, what I needed to know was that $1 is referring to the original text. I really appreciate it.

Just one more question, what does the "/i" mean?

[Weedpacket]

/i : Case-insensitive matching.