PHP 7.1.0 Release Candidate 4 Released

Documentation for PHP 4


The PHP 4 documentation was removed from the PHP Manual in August 2014, approximately six years after PHP 4 reached its end of life. However, we have provided downloadable copies of the manual for anyone who would need it.

PHP 4 Manual

An attempt has been made to preserve as much documentation related to PHP 4, as possible. Despite this, we don't have a nice, separate manual covering only PHP 4. The reason for this is how our documentation is structured. Even so, the archived copy describes more aspects of PHP 4 than actual manual described in August 2014 (e.g. it covers more PHP 4 extensions).

To download a copy of the manual for PHP 4, see the documentation archives. Please, remember, that archived version should not be used in everyday development, unless you are developing PHP 4 applications. This version lacks many topics connected with PHP 5 and it is not updated anymore.

Migrating to PHP 5

All users are strongly encouraged to upgrade their environments to PHP 5. Please, read our guides for Migrating from PHP 4 to PHP 5.0.x and Migrating from PHP 4 to PHP 5 FAQ, for more information.

To Top