Introduction to PHP7
PHP7 is a brand new version of the PHP programming language, which has been greatly improved mainly in terms of performance. Official documents show that PHP7 can achieve twice the performance of PHP5.x version. At the same time, the syntax of PHP is sorted out, and many popular syntax formats in other languages are provided. The commendable thing is that after making such a big change, the compatibility of PHP7 is still very good. For the vast majority of applications, you can migrate to the PHP7 version without making any modifications.
Where is the PHP6 version?
When talking about PHP7, everyone will definitely ask, where does the PHP6 version come from? This is a long story. As early as 2005, the PHP community launched the PHP6 project, which aims to provide PHP with fully built-in unicode support. However, due to various difficulties, the project was eventually canceled in 2010. Although the PHP6 project has been cancelled, a large number of functions have been implemented in the PHP5.x version. The most important thing here is the improvement of OOP. This also helped PHP realize the leap from process-oriented to object-oriented programming. A large number of PHP OOP programming frameworks have also appeared on the market.
Later, Brother Niao joined the PHP core development team
Later, Brother Niao joined the PHP core development project. Brother Niao initiated a project to reconstruct the PHP interpretation engine, called PHPNG,
The PHPNG project mainly restructures the PHP engine. Soon Brother Niao’s project team made extraordinary achievements, gained recognition from the PHP development community, and was merged into the backbone of PHP, which is what we now call the PHP7 version. .
Why not continue the sequence of PHP6?
About this issue, PHP official gave a detailed explanation
The PHP6 version actually already exists.
Although PHP6 cannot release the GA version, PHP6 is already well known.
PHP6 has been discussed at many public meetings and occasions.
PHP6 is also well known by many surrounding communities. (There are many PHP6 books)
Using PHP6 will cause a lot of trouble.
Version jumping is also common in open source software and commercial software. For example, MariaDB jumped to 10.0, and Symantec skipped version 13. (Editor's note: Windows series versions are also very typical)
Version 6 is usually associated with failure in the dynamic language field. PHP6 failed, Perl6 failed. Outside of the dynamic language world, MySQL6 has already existed but has not been released. (Laughing wildly)
#7 is considered an auspicious number in both Eastern and Western cultures. (Laughing wildly)
So there is the awesome and messy PHP7 version.