A number of PHP users, however, have expressed concern that the changes that are being made will render a number of popular extensions unusable, potentially making the upgrade less desirable for current users.
For instance, the mod_php server API may be discontinued in the new version. This API is used by many sites to allow the Apache Web server to handle tasks on behalf of PHP, noted PHP developer Manuel Lemos in a blog post.
Lemos speculated that development of phpng may have been inspired by Facebook's release in March of Hack, a PHP-like language with many additional features not in PHP itself.
PHP is one of the most widely used programming languages on the Web: It ranked as the seventh-most-heavily used language worldwide, according to the latest Tiobe index of popular programming languages.
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