Migration of applications to PHP 5.4

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Newsgroups php.general
Message-ID <[email protected]> 
Hello,

i recently migrated my webserver from Debian Lenny (with PHP 4.x) to Wheezy with PHP 5.4.

Some applications like mediawiki could be updated and they are running fine.

But there are some old and beloved applications that run any more.
A good example is PHPmyedit 5.7.1 http://www.phpmyedit.org/
The first page with data is displayed but all links and buttons are dead!

There is no error produced by PHP and i have no idea why it is not working?
I'm have only basic knowledge with PHP and would be glad to have some tips how to debug things without error.

My hope is that this migration problem is known and can be fixed simply?

Thanks
Karsten
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