Analysis of new features of PHP6

This article describes the new features of PHP6. Share it with everyone for your reference, the details are as follows:

1. Support Unicode

Supporting Unicode is inevitable. Although Unicode takes up more space, the convenience brought by Unicode far outweighs the disadvantages of taking up space, especially in In today's international world, hardware devices are becoming more and more powerful, and network speeds have also been greatly improved. Such small shortcomings can be ignored. Another point is that PHP can also set whether to enable Unicode support in the .ini file. The decision is up to you. This is a good idea. Turning off Unicode support will not significantly improve PHP's performance. Mainly The impact is on functions that require quoted strings.

2.Register Globals will be removed

This is an important decision. Many new PHP developers will find Register Globals very convenient, but they ignore that Register Globals will bring program security risks. , this function is turned off on most hosts. In my impression, starting from PHP 4.3. The product will be completely unusable, and there is no other way but to rewrite it. I believe that in the current PHP world, there should be very few programs produced in the PHP3 era.

3.Magic Quotes will disappear

Magic Quotes mainly automatically escapes characters that need to be escaped. The removal of this feature is in line with the aspirations of most PHP developers.

4.Safe Mode Cancel

Honestly, I don’t know what’s wrong with this mode, just cancel it, it won’t be used anyway

5. ‘var’ is aliased as ‘public’

Var declaration in the class Becoming an alias of public is believed to be a decision made to be compatible with PHP5. PHP6 can now also be called an OO language.

6. Returning by reference will cause an error

Now the compiler will report an error by returning by reference. For example, $a =& new b(), function &c(), OO language uses references by default, so there is no need to use & anymore.

7.zend.ze1 compatbility mode will be removed

Zend.ze1 compatibility mode will be removed. PHP5 is compatible with the old PHP4, so you can choose whether to enable the compatibility mode in the .ini. The reason is that PHP5 The second generation parsing engine is used, but the compatibility mode is not 100% able to parse PHP4 syntax, so the product of the old era has been removed.

8.Freetype 1 and GD 1 support will disappear

These two are Libs for a long time, so they are no longer supported. GD1 has long been replaced by the current GD2.

9.dl() was moved to SAPI

dl() mainly allows designers to load extension Libs, and is now moved to SAPI

10.Register Long Array removed

Starting from PHP5, it is turned off by default. Officially removed in PHP6.

11. Some Extension changes

For example, XMLReader and XMLWriter will no longer appear as Extensions. They will be moved into the core of PHP and are enabled by default. The ereg extension will be put into PECL, which means It will be moved out of the PHP core to make way for the new regular expression extension. In addition, the Fileinfo extension will also be imported into the PHP core.

12.APC will be imported into the core

This is a feature to improve PHP performance, now it will be put into the PHP core with the option to enable APC or not

13. Say goodbye to ASP style start tags

Original It is to please ASP developers to switch to PHP. This approach is no longer needed today. Finally, do not expect that the performance of PHP6 can comprehensively surpass PHP5. It is possible that the execution efficiency of PHP6 will be even slower than that of PHP5. But what can be expected is that the PHP development team will work hard to improve PHP5 and surpass PHP5.

So, friends who are interested in PHP6 can now download it from the PHP official website and try whether these functions have really been reflected in PHP6

I hope this article will be helpful to everyone in PHP programming.

The above has introduced the analysis of the new features of PHP6, including aspects of it. I hope it will be helpful to friends who are interested in PHP tutorials.