A case-insensitive str_replace() ??

Anon

Is there a function which acts like str_replace(), but it case-sensitive? I don't want to have to deal with parsing the string (ie, with things like ^ and [ and ] etc) and dealing with special characters... or could I just quotemeta() all the strings? Would that work for eregi_replace() ??

Thanks in advance.

--Jason

amcgrath

do you mean using the strtolower() function first?

Anon

You could always use preg_replace() or eregi_replace() to do what you need. Note that both of these will accept regular expressions, so be careful what you put into there 🙂

Anon

I want to keep the capitalizations and stuff, so strtolower() would work, but it would screw the string over...

--Jason

Anon

The regular expressions are the problem... otherwise, I'd use eregi_replace() or preg_replace() without hesitation. I'm using material from a form as the search, as well as the replace... so, if I did use eregi_replace(), then it might get screwed up by the user's input.

--Jason

Anon

I had to figure this one out 😉 I guess if you can not use any regular-expression compatible replacement, this one should do the trick for you... Properly named stri_replace():

function stri_replace($replacer,$replacement,$string) {
$lowercase_replacer = strtolower($replacer);

// Make all the words we are replacing lowercase
$string = str_replace($replacer,$lowercase_replacer,$string);

// Replace all occurences
$string = str_replace($lowercase_replacer,$replacement,$string);

return $string;

}

It works exactly like str_replace() as far as arguments go. I tested this on PHP 4.2.0-dev incase you have any problems (You shouldn't). Hope this helps.

-Josh B

Anon

Side note: That doesn't work in all cases 🙁

Anon

Heh, I knew i could figure something out that didn't use regular expressions :o

function stri_replace($replacer,$replacement,$string) {
   $position = 0;
   while($position < strlen($string)-strlen($replacer)) {
      $word = substr($string,$position,strlen($replacer));
      if(!strcasecmp($replacer,$word)) {
         $string = str_replace($word,$replacement,$string);
         $position += (strlen($replacement)-1);
      }
      $position++;
   }

   return $string;
}

Maybe not the very best way, but it seems to work for me properly as a case-insensitive regular expression replacement would.

-Josh