USER_100 Template Data
3
Root Category
4
-- General Information
6
-- Obtaining PHP
0
-- Migrating PHP
1
---- Migrating from PHP 2 to PHP 3
3
---- Migrating from PHP 3 to PHP 4
4
---- Migrating from PHP 4 to PHP 5
2
-- Database issues
0
-- PHP and its friends
1
---- PHP and HTML
3
---- PHP and COM
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Migrating from PHP 3 to PHP 4 (3)
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PHP 4 was designed to be as compatible with earlier versions of PHP as possible and very little functionality was broken in the process. If you're really unsure about compatibility you should install PHP 4 in a test environment and run your scripts there. Also see the appropriate migration appendix of this manual.
Migrating from PHP 3 to PHP 4
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Although native session support didn't exist in PHP 3, there are third-party applications that did (and still do) offer session functionality. The most common method was by using » PHPLIB.
Do sessions work in PHP 3?
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Since PHP 4 is basically a rewrite of the entire PHP engine there were very few functions that were altered and only then some of the more exotic ones.
Incompatible functions?
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