PHP 5
Soon after, the demand for more
common object-oriented features increased immensely, and Andi came up with the
idea of rewriting the objected-oriented part of the Zend Engine. Zeev and Andi
wrote the "Zend Engine II: Feature Overview and Design" document and
jumpstarted heated discussions about PHP’s future. Although the basic language
has stayed the same, many features were added, dropped, and changed by the time
PHP 5 matured.
For example, namespaces and
multiple inheritance, which were mentioned in the original document, never made
it into PHP 5. Multiple inheritance was dropped in favor of interfaces, and
namespaces were dropped completely. You can find a full list of new features in
Chapter, "What Is New in PHP 5?" PHP 5 is expected to maintain and
even increase PHP’s leadership in the web development market. Not only does it
revolutionizes PHP’s objectoriented support but it also contains many new
features which make it the ultimate web development platform.
The rewritten XML functionality
in PHP 5 puts it on par with other web technologies in some areas and
overtakes them in others, especially due to the new SimpleXML extension which
makes it ridiculously easy to manipulate XML documents. In addition, the new
SOAP, MySQLi, and variety of other extensions are significant milestones in
PHP’s support for additional technologies.
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