PHP7 use of experience with high performance and compatibility and the expansion of support is not enough to explain the text

This article mainly introduces the PHP 7 installation experience, high performance, compatibility, extension support is not enough (upgrade PHP to be cautious), very practical value, the need for friends can refer to the next

With the release of PHP 7, these days about PHP 7 performance and compatibility has become a hot topic of discussion, PHP 7 shows the high performance to many people, some "early adopters" of the friend has been applied to the production environment of PHP 7. At the same time, popular applications such as LNMP have been updated in a timely fashion, beginning to support PHP 7.

When it comes to PHP performance, you have to say the HHVM that was previously shared, which is the tool that Facebook developed to improve PHP performance, using the Just-in-time (JIT) compiler to convert PHP code into some kind of bytecode. In the actual testing process, HHVM for PHP performance improvement is a qualitative leap, efficient PHP operating environment to improve PHP performance of more than 9 times times.

PHP has been widely criticized in recent years is a performance bottleneck problem, many developers have abandoned PHP and fled, and HHVM's perfect performance for PHP development is very unfavorable. PHP 7 is the PHP community response to HHVM, PHP 7 official release version in PHP performance is very much improved, the actual test found in some cases PHP 7 performance over HHVM.

This article will bring you the PHP 7 installation and use experience, want to be eager to experience PHP 7 performance of Friends, before the official upgrade of PHP is better to do more than a few times the program compatibility test, although the official said PHP 7 backwards compatibility 99%, But for the sake of insurance, we still need to be cautious when it is applied to the production environment.

PHP 7 Installation Experience: High performance, compatibility, extended support is not enough, upgrade PHP to be cautious

First, the performance of PHP 7 several key points

PHP 7 compared to the previous version of PHP can say that the performance has a qualitative leap, but the so-called "good Horse with good saddle, good car with sail", want to play PHP 7 performance advantages, but also need to prepare from the following aspects: (this part is quoted from PHP7 core developers, YAF, Yar, Yac and other project author: laruence).

1. Remember to enable Zend Opcache, enabling Opcache is very simple, include in the php.ini configuration file:

Zend_extension=opcache.soopcache.enable=1opcache.enable_cli=1 "

2. Using the new compiler, it is recommended that GCC 4.8 or more, because only gcc 4.8 or more PHP 7 will turn on the global Register for Opline and execute_data support, this will bring about 5% performance improvement.

3. Open Hugepage facilitates PHP 7 faster, first in the system to open hugepages, and then turn on Opcache huge_code_pages, CentOS 6.5 as an example, through the command: $sudo sysctl vm.nr_ HUGEPAGES=512, allocate 512 reserved large pages of memory:

$ cat/proc/meminfo | grep hugeanonhugepages:  106496 kbhugepages_total:   512hugepages_free:   504HUGEPAGES_RSVD:    27hugepages_surp:    0Hugepagesize:    2048 KB

Then add in php.ini: Opcache.huge_code_pages=1, so that PHP will be its own text segment, as well as memory allocation of huge are used in large memory pages to save, reduce TLB miss, thereby improving performance.

4. Open Opcache File Cache (experimental), by opening this, you can let opcache cache opcode cache to external files, for some scripts, there will be a significant performance improvement. The method is to add: Opcache.file_cache=/tmp in php.ini. This will allow PHP to cache some opcode binary export files in the/tmp directory, which can exist across the PHP life cycle.

5. PGO. If your PHP is dedicated to a project, such as just for your WordPress, or Drupal, or whatever, then you can try to improve PHP with PGO, specifically to improve performance for your project. Specifically, take WordPress 4.1 as the optimization scenario. First, when compiling PHP, first: $ make prof-gen.

6. Then use your project to train PHP, for example for wordpress:$ sapi/cgi/php-cgi-t 100/home/huixinchen/local/www/htdocs/wordpress/index.php >/ Dev/null, that is, let php-cgi run 100 times the homepage of WordPress, thus generating some profile information in the process. At last:

$ make prof-clean$ make prof-use && make install

7. The PHP7 you compile at this time is the most high-performance compiled version tailored for your project.

Second, PHP 7 installation and compilation

1, PHP 7 official website:

2, hands-on ability of friends, you can directly to the official download PHP 7, and then manually edit the installation. If you are accustomed to using the lnmp.org webmaster's LNMP One-click installation package, you can try to release the LNMP 1.3 beta, has increased the PHP7 support: the smooth migration of the site to LNMP or lamp to build a station environment method.

3, Oneinstack provides the LNMP installation package already has the PHP 71 key installs, when executes the script, may choose the PHP 7 installs, PHP 7 currently only has the official own Zend Opcache extension to install.

4, Oneinstack installation of PHP 7 installed successfully.

5, this is the PHP 7 information display.

6. This is the Opcache Control Panel of PHP 7 provided by Oneinstack.

Third, PHP 7 and the old version of PHP, HHVM performance Comparison

1, this is the foreign developer test PHP 7 and PHP 5.6 in WordPress, Drupal and other popular programs performance, the result is obviously PHP 7 performance improvement.

2, PHP 7 for WordPress and other programs, not only to improve the speed of a single execution, with WordPress running in PHP 7 the longer, performance improvement is more.

3, the above also said that PHP 7 for PHP performance improvement in some aspects has exceeded the HHVM, which is the foreign Zend.com official website given PHP 5.6, PHP 7, HHVM in different programs to perform efficiency comparison results.

4, in the professional open-source e-commerce system magento test PHP 5.6, PHP 7, HHVM execution efficiency, PHP 7 is PHP 5.6 running speed of twice times, and memory consumption is also lower than PHP 5.6 30%.

5, Drupal 8 on the test PHP 7 efficiency is the fastest, has exceeded the HHVM.

6, the WordPress test found that PHP 5.6 execution needs to occupy 100MB of memory, and PHP 7 only 25MB.

7, in different program execution speed, PHP 7 obviously has the lead, Ruby 2.1, Python 2.7.8, Perl 5.18.4 are less than PHP 7.

Iv. PHP 7 Performance Test Results report

1, empty Say no, PHP 7 running program performance in the end? Here the tribe with a brand-new WordPress test object, run on PHP 7 WordPress home Page load time test display 0.029 seconds, memory is 3.39MB.

2, this is the same WordPress page run PHP 5.6 on the page load time: 1.955 seconds, memory consumption of 3.92MB. From the data, PHP 7 has already won out PHP 5.6.

3, PHP 7 running WordPress Efficiency relative to the previous version did have a qualitative improvement, in order to fully understand the performance of PHP 7, here according to the Web server pressure Web performance test method, with Webbench simulation 10 seconds 200, 400 connections, the speed is 8000 pages /min.

4, at this time, VPS Server system load is 3.49.

5, to increase the number of analog connections to 1600, the speed remains at 8000 pages/min.

6, at this time, VPS Server system load is 17, it should be a little hard.

7. Increase the number of analog connections to 5,000, the speed is 4800 pages/min, the speed began to slow down.

8, at this time, VPS Server system load is 23, the server is overweight.

9, in order to test PHP 7 in this VPS host capacity limit, Webbench analog 10,000 connection number in 20 seconds continuously access the server.

10, at this time, VPS Server system load nearly 90, should be reached the limit, but the server still does not crash.

11, Next, let us take a look at the same configuration of the VPS host running WordPress stress test results, the first is to use Webbench to simulate 10 seconds within 200, 400 connections, the speed is 3600 pages/min, compared to the above PHP 7 test speed is half slow.

12, this is the PHP 5.6 test 200, 400 connections of the system load, has reached 10, significantly more than in the PHP 7 environment test 3.49.

13, in the PHP 5.6 test to increase the number of analog connections to 1000, 2000, when the speed has been reduced to 1600 pages/min, the number of successful connections also decreased to about 500, much lower than in the PHP 7 test 2700.

14. At this time, the system load has reached 17.

15, in PHP 5.6 with Webbench Test connection number is 10000, in 20 seconds to continuously access the server. At this point, the test is stuck and there is no result.

16, here VPS Server System load has reached more than 1000, the server has crashed.

17, PHP 5.6 Under the WordPress site has been down.

Five, PHP 7 compatibility issues

1, the current domestic discuz and so on also do not support PHP 7,php extension is only the official Opcache can use, and other such as Eaccelerator, XCache, memcached, we can always focus on the Extended support list:

2, after testing, PHP 7 run WordPress without any problems.

3, install the wordpress plugin on PHP 7 is not a problem.

4, PHP 7 There are some functions, operators and other possible incompatibility problems, but 99% of the program may not be used.

Vi. Summary of PHP 7 installation and usage experience

1, the use of PHP 7 after a surprise is that, indeed, as foreign developers testing, PHP 7 performance is basically flat with HHVM, because HHVM with the real-time (Just in) compiler to compile PHP code to machine instructions, so a lot of PHP programs run in HHVM needs to be improved.

2, PHP 7 with HHVM ultra-high performance, but also with the advantages of PHP backwards compatibility, I believe in the near future PHP 7 will be more and more people's recognition and acceptance. While the current support for PHP 7 cache, acceleration and other extensions is not much, but it is only a matter of time, more and more developers will be added to the development of PHP 7 in the ranks.