My client only has PHP4 installed on his hosting account. And I need to use the function [or a substitute] in order to find the last occurance of a character in a string.

Does anyonoe know of a solution to this? As strripos is not part of PHP4 [also isn't recognised by Dreamweaver which is a bit strange]

Try applying strrpos to the string in lowercase format. The position won't change and you'll have a case-insensitive search.

I recently ran into something where I needed to use a string to search, in PHP 4, instead of character. Basically, I just reversed the string, then did strpos. Here's a snippet:

//PHP 4 doesn't support multiple characters in strrpos(), so we must find positions based on strrev()
trim(strip_tags(substr($line, (strlen($line) - strpos(strrev($line), strrev("<TD >"))))))

Intriguing Cory. I wonder which is faster: converting to lowercase or reversing the string...

For my circumstance, it wasn't an issue of case sensitivity, it was the fact that strrpos() acts like strrchar(), and does not handle multiple characters.

Now that I'm re-reading, I'm not sure that the original poster was running into that circumstance...

Whenever I'm looking for a PHP4 implementation of a PHP5 function, I head straight to php.net...

The comments at the bottom of http://php.net/strripos , for example, have this little gem:

PHP Code:

if(!function_exists("stripos")){
    function stripos(  $str, $needle, $offset = 0  ){
        return strpos(  strtolower( $str ), strtolower( $needle ), $offset  );
    }/* endfunction stripos */
}/* endfunction exists stripos */

if(!function_exists("strripos")){
    function strripos(  $haystack, $needle, $offset = 0  ) {
        if(  !is_string( $needle )  )$needle = chr(  intval( $needle )  );
        if(  $offset < 0  ){
            $temp_cut = strrev(  substr( $haystack, 0, abs($offset) )  );
        }
        else{
            $temp_cut = strrev(    substr(   $haystack, 0, max(  ( strlen($haystack) - $offset ), 0  )   )    );
        }
        if(   (  $found = stripos( $temp_cut, strrev($needle) )  ) === FALSE   )return FALSE;
        $pos = (   strlen(  $haystack  ) - (  $found + $offset + strlen( $needle )  )   );
        return $pos;
    }/* endfunction strripos */
}/* endfunction exists strripos */ 


Hopefully that helps you...