Introduction to PHP7.0 installation in Linux environment

Comparison between PHP7 and HHVM
The performance of PHP7 in real scenarios is indeed equivalent to that of HHVM, and even exceeds HHVM in some scenarios. The operation and maintenance of HHVM is complex and it is a multi-threaded model. This means that if a thread causes a crash, the entire service will hang and it will not automatically restart. In addition, it uses JIT, which means that it needs to be warmed up after restarting. Without preheating, the performance will be worse. Moreover, the multi-threaded model is difficult to debug, which is very unsuitable for web services that pursue stability.

For versions before Nginx and PHP7.0, please refer to this article: Linux environment Nginx installation and debugging and PHP installation

The official version of PHP7.0 has been released around November 2015, and is currently PHP7.0.2 version, I first started following the first beta version of php7 in August 2015, and now the official version is released.

linux version: 64-bit CentOS 6.6

Nginx version: nginx1.8.0

php version: php-7.0.2

Recommended ( Free): PHP7

##Download

wget http://php.net/get/php-7.0.2.tar.gz/ from/a/mirror

It is recommended to read the installation help file before installation INSTALL

Unzip the installation

tar zxvf php-7.0.2.tar .gz

cd php-7.0.2

First check the installation help

./configure --help

./configure --prefix=/usr/local/php \

–with-curl

–with-freetype-dir
– with-gd
–with-gettext
–with-iconv-dir
–with-kerberos
–with-libdir=lib64
–with-libxml-dir
–with- mysqli
–with-openssl
–with-pcre-regex
–with-pdo-mysql
–with-pdo-sqlite
–with-pear
–with-png- dir
–with-xmlrpc
–with-xsl
–with-zlib
–enable-fpm
–enable-bcmath
–enable-libxml
–enable-inline -optimization
–enable-gd-native-ttf
–enable-mbregex
–enable-mbstring
–enable-opcache
–enable-pcntl
–enable-shmop
–enable-soap
–enable-sockets
–enable-sysvsem
–enable-xml
–enable-zip

If the configuration is wrong, you need to install the required Module, install dependent libraries directly with yum

yum -y install libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel mysql pcre-devel

Note: There are several configurations that cannot be configured when installing php7beta3. You need to yum it. This is no longer the case with php-7.0.2.

yum -y install curl-devel

yum -y install libxslt-devel

Compile and install

make && make install

Configuration file

cp php.ini-development /usr/local/php /lib/php.ini

cp /usr/local/php/etc/php-fpm.conf.default /usr/local/php/etc/php-fpm.conf

cp /usr/local/php/etc/php-fpm.d/www.conf.default /usr/local/php/etc/php-fpm.d/www.conf

cp -R ./sapi/fpm/php-fpm /etc/init.d/php-fpm

It should be noted that www in php7 The .conf configuration file configures the port number and other information of phpfpm. If you modify the default 9000 port number, you need to change it here, and then change the nginx configuration

Start

/etc/init.d /php-fpm

View phpinfo()

php7 and php5 performance analysis comparison

Generate an array of 600,000 elements, and determine whether the key is by searching for the key exist.

PHP version 5.4.44

[root@localhost www5.4.44]# time /usr/local/php5.4.44/bin/php search_by_key.php

real 0m0.351s

user 0m0.300s
sys 0m0.050s

PHP version 5.5.28

[root@localhost www]# time /usr/local/php/bin/php search_by_key.php
real 0m0.361s
user 0m0.304s
sys 0m0.057s

PHP version 7.0.0

[root@localhost www7]# time /usr/local/php7/bin/ php search_by_key.php
real 0m0.114s
user 0m0.097s
sys 0m0.017s

Obviously the performance of php7 is 3 times that of php5!

Configuring opcache

Official website address: http://php.net/opcache
Use the following recommended settings to obtain better performance:

opcache.memory_consumption=128
opcache.interned_strings_buffer=8
opcache.max_accelerated_files=4000
opcache.revalidate_freq=60
opcache.fast_shutdown=1
opcache.enable_cli=1
You can also disable opcache.save_comments and enable opcache.enable_file_override. It should be reminded that the above configuration must be rigorously tested before being used in a production environment. Because there is a known issue with the above configuration, it will cause exceptions in some frameworks and applications, especially when there are documents using comment annotations.

vim /usr/local/php7/etc/php.ini

Join

zend_extension=/usr/local/php7/lib/php /extensions/no-debug-non-zts-20141001/opcache.so

restart

killall php-fpm

/etc /init.d/php-fpm

Opcache status test code (https://gist.github.com/ck-on/4959032) Give a demo:

<?php /*
OCP - Opcache Control Panel (aka Zend Optimizer+ Control Panel for PHP)
Author: _ck_ (with contributions by GK, stasilok)
Version: 0.1.6
Free for any kind of use or modification, I am not responsible for anything, please share your improvements
 
* revision history
0.1.6 2013-04-12 moved meta to footer so graphs can be higher and reduce clutter
0.1.5 2013-04-12 added graphs to visualize cache state, please report any browser/style bugs
0.1.4 2013-04-09 added "recheck" to update files when using large revalidate_freq (or validate_timestamps=Off)
0.1.3 2013-03-30 show host and php version, can bookmark with hashtag ie. #statistics - needs new layout asap
0.1.2 2013-03-25 show optimization levels, number formatting, support for start_time in 7.0.2
0.1.1 2013-03-18 today Zend completely renamed Optimizer+ to OPcache, adjusted OCP to keep working
0.1.0 2013-03-17 added group/sort indicators, replaced "accelerator_" functions with "opcache_"
0.0.6 2013-03-16 transition support as Zend renames product and functions for PHP 5.5 (stasilok)
0.0.5 2013-03-10 added refresh button (GK)
0.0.4 2013-02-18 added file grouping and sorting (click on headers) - code needs cleanup but gets the job done
0.0.2 2013-02-14 first public release
 
* known problems/limitations:
Unlike APC, the Zend OPcache API
- cannot determine when a file was put into the cache
- cannot change settings on the fly
- cannot protect opcache functions by restricting execution to only specific scripts/paths
 
* todo:
Extract variables for prefered ordering and better layout instead of just dumping into tables
File list filter
 
*/
 
// ini_set(&#39;display_errors&#39;,1); error_reporting(-1);
if ( count(get_included_files())>1 || php_sapi_name()=='cli' || empty($_SERVER['REMOTE_ADDR']) ) { die; } // weak block against indirect access
 
$time=time();
define('CACHEPREFIX',function_exists('opcache_reset')?'opcache_':(function_exists('accelerator_reset')?'accelerator_':''));
 
if ( !empty($_GET['RESET']) ) {	
if ( function_exists(CACHEPREFIX.'reset') ) { call_user_func(CACHEPREFIX.'reset'); }
header( 'Location: '.str_replace('?'.$_SERVER['QUERY_STRING'],'',$_SERVER['REQUEST_URI']) );
exit;
}
 
if ( !empty($_GET['RECHECK']) ) {
if ( function_exists(CACHEPREFIX.'invalidate') ) {
$recheck=trim($_GET['RECHECK']); $files=call_user_func(CACHEPREFIX.'get_status');
if (!empty($files['scripts'])) {
foreach ($files['scripts'] as $file=>$value) {
if ( $recheck==='1' || strpos($file,$recheck)===0 ) call_user_func(CACHEPREFIX.'invalidate',$file);
}
}
header( 'Location: '.str_replace('?'.$_SERVER['QUERY_STRING'],'',$_SERVER['REQUEST_URI']) );
} else { echo 'Sorry, this feature requires Zend Opcache newer than April 8th 2013'; }
exit;
}



?>nbsp;html>

<p>
 
</p><h1 id="a-Opcache-Control-Panel-a"><a>Opcache Control Panel</a></h1>
 
<p>
<a>Details</a>
<a>Files</a>
<a>Reset</a>
<?php  if ( function_exists(CACHEPREFIX.&#39;invalidate&#39;) ) { ?>
<a>Recheck</a>
<?php  } ?>
<a>Refresh</a>
</p>
 
<?php  
if ( !function_exists(CACHEPREFIX.&#39;get_status&#39;) ) { echo &#39;<h2>Opcache not detected?'; die; }
 
if ( !empty($_GET['FILES']) ) { echo '<h2 id="files-cached">files cached</h2>'; files_display(); echo '

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