Cannot convert to ordinal value? (I don't want to)

[XpertWorlock]

First time I've ran into this problem.  What I am doing is getting the content of a page, cutting it in half (for big pages), and than putting them back together (not in this).

 

$half = intval((strlen($html) / 2));
$html1 = substr($html,0,$half);	
$html2 = substr($html,$half);

 

Now most of the time this works perfectly fine, as all I'm doing is what I explained above.  Unfortunately on one page I got a silent error (the script just stopped even though report all is on), but it seems to be  "Cannot convert to ordinal value" on the line where $html1 is set.

 

I could fix it with htmlspecialchars() but it makes the strings bloated.

 

Any help guys?