Regex help - matching entire words.

I wanna match the word "hello" - case insensitive.

But it has to be the word "hello" by itself, not "hellos" or "sfhello".

And I want to use preg replace, so that the hello is the $1 variable.

Poor explanation, I know, but I don't how else to explain. Should be relatively simple for those people who actually like regex.

 

hello|Hello would do it, I think.

 

You'd think so.

My code:

$var = "sfahellos";

$funcs="hello|test";

$result = preg_replace("~($funcs)~si","<span style='color:#00F;font-weight:bold'>$1</span>",$var);

PHP:

The problem is, the hello is still turning blue, which I don't want - unless $var equalled "hello" exactly.

As $var equals "sfahellos", it shouldn't do anything.

Cheers,

BP

 

^hello|test$ works if your input is only one word. If you wanted to do it in a sentence you'd need to have spaces in your string.

 

I need to do it without spaces. And I've seen it done before, so I know its possible....

Thanks anyway.

 

/^hello$/i

??