Description:
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Deprecated functions are marked with a big red warning on the website, like for example this one:

http://hu.php.net/manual/en/function.eregi.php

The warning text is:

"This function has been DEPRECATED as of PHP 5.3.0. Relying on this feature is highly discouraged."

But there is absolutely no idea given of what kind of other functions could be used to replace the deprecated function. Especially bad when trying to fix an older script to work on an updated server, with no serious knowledge of every old function used in an old script. 

One needs to clearly read the function, understand old behavior, then start from the Table Of Contents of PHP documentation, try to find a new function, and then convert the call.

Instead, these warnings should

1. link to recommended replacements
2. note most important changes between the old and new function

Note that I also checked "See also" links on many deprecated functions when I ran into this problem, and in most cases all see-also are also deprecated, so no there is no help.