[SOLVED] str_replace vs. preg_replace

[AV1611]

ok,

 

I have written a shoutbox that seems to work ok so far.

 

Now I need to make a language filter.

 

I can come up with a word list but what I don't know how to do is make it not "case sensitive".

 

so

 

Frog

FROG

frOg

froG

 

are all the same.

 

Do I need to use preg_replace? I SUCK at regex...

 

Guidance?

 

Thanks.

[trq]

You'll be much better of with str_ireplace(). Its amazing what you'll find in the manual.

[JasonLewis]

Then just feed it arrays.

 

$str = "There was a big frog which ate the moth. What of the beetle?";
$bad = array("frog","moth","beetle");

echo str_ireplace($bad, "***", $str);

[AV1611]

never heard of that command? is that new ?

 

[AV1611]

Ah... I see it's new in PHP5. I haven't done a case insensitive replace in a long time so I guess I didn't ever notice that.

I really do try and read the manual

 

[JasonLewis]

str_ireplace() was added in PHP5.

If you are not using PHP5 you could do it like this.

 

$str = "There was a big FrOg which ate the moTH. What of the BeETlE?";
$bad = array("/frog/i","/moth/i","/beetle/i");

echo preg_replace($bad, "***", $str);

//OR

$bad = array("frog","moth","beetle");
foreach($bad as $word){
$str = preg_replace("#$word#i", str_repeat("*", strlen($word)), $str);
}
echo $str;

[trq]

Ah... I see it's new in PHP5.

 

Sorry, Ive never used anything older than php5 so....