Sophie: php-manual-en-4.3.0-2mdk noarch

php-manual-en-4.3.0-2mdk.noarch.rpm

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>The Zend Engine</H1
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>&#13;    Of course, extensions can also be implemented directly in the Zend
    engine. This strategy is good if you need a change in the language
    behavior or require special functions to be built directly into
    the language core. In general, however, modifications to the Zend
    engine should be avoided. Changes here result in incompatibilities
    with the rest of the world, and hardly anyone will ever adapt to
    specially patched Zend engines. Modifications can't be detached
    from the main PHP sources and are overridden with the next update
    using the "official" source repositories. Therefore, this method
    is generally considered bad practice and, due to its rarity, is
    not covered in this book.
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