I have PHP5 installed at home. I have some PHP4 code that isn't working at home and I think it's because they use "<?=" everywhere to echo stuff which PHP5 doesn't regconize. Is there a variable in php.ini where I can enable support of this? Thanks.
short_open_tag
(And now you've seen the main reason it's a good idea to never use them in your code. 😉 )
From PHP 6 it will not be possible to use short tags at all. I suggest that you make sure to cover that in future scripts.