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>Apêndice C. Migrating from PHP 4 to PHP 5</A
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>Índice</B
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>What has changed in PHP 5</A
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>Migrating Configuration Files</A
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> PHP 5 and the integrated Zend Engine 2 have greatly improved PHP's
performance and capabilities, but great care has been taken to break as
little existing code as possible. So migrating your code from PHP 4 to 5
should be very easy. Most existing PHP 4 code should be ready to run
without changes, but you should still know about the <A
HREF="migration5.incompatible.html"
>few differences</A
> and
take care to test your code before switching versions in production
environments.
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