> Untested, very crude:
> 
> <?php
> $maxlen = max(strlen($text1), strlen($text2));
> for ($i = 0; $i < $maxlen; $i++){
> if (@$text1[$i] == @$text2[$i]) echo @$text1[$i];
> else @echo "<font color=red>$text1[$i]|$text2[$i]</font>";
> }
> ?>
 donot you think you program will just bring the server to its foot ,if the 
text message encountered is very large of order of 40 KB or
larger.is<http://larger.is>there any other efficient method.

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