Recent operating systems provide the ability to perform
versioning and scoping. This features make it possible to let
PHP 3 and PHP 4 run as concurrent modules in one Apache server.
This feature is known to work on the following platforms:
Linux with recent binutils (binutils 2.9.1.0.25 tested)
Solaris 2.5 or better
FreeBSD (3.2, 4.0 tested)
To enable it, configure PHP 3 and PHP 4 to use APXS
(--with-apxs) and the necessary
link extensions (--enable-versioning).
Otherwise, all standard installations instructions apply. For example:
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Php migration4.php4.with.php3 syntax tutorial
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