Overloading PHP's functions

[cheald]

Is there a way to overload any given PHP function without doing a source edit/compile? In other words, is it possible to replace a function with your own instance of one in only a particular script.

Here's what I want to do:

replace the echo function with my own that will take the parameter, strip any redundant whitespaces, and spit out the output. This is reducing my page size by 1-3kb per page, but I don't want to have to go through and recode every echo to myEcho or whatever.

I want something that looks like this:

function echo($text) {
$b = preg_replace("/(\s\s)*/","",$b);
print $b;
}

Anyone know of a way to do it in PHP?

[cheald]

Never mind - solved it. Easier than I thought, though I didn't overload anything. Here's what I did (In case anyone else wants to do this. It cuts down on your page size, and makes the code fairly unreadable, meaning less of a chance that anyone will steal it.)

beginning of file: ob_start();

end of file:

$alltext = cleanText(ob_get_contents());
ob_end_clean();
echo $alltext;
ob_end_flush();

function cleanText($text) {
$b = preg_replace("/(\s\s)*/","",$text);
return $b;
}

Works quite nicely, if I say so myself!