Introduction to installing PHP7 in Linux environment

Recommended (free): PHP7

Download

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

Unzip and install

# 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 modules, directly yum and install the dependent libraries together

# yum -y install libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel MySQL pcre-devel

Note: Installation In php7beta3, there were several configurations that couldn't be configured, and you needed to yum them. 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 the configuration file www.conf in php7 configures the port of phpfpm number and other information, if you change 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()

Performance analysis comparison between php7 and php5

<?php  //time /usr/local/php5/bin/php search_by_key.php  $a = array();  
    for($i=0;$i<600000;$i++){  
        $a[$i] = $i;  
        }  

    foreach($a as $i)  
    {  
        array_key_exists($i, $a);  
    }  
?>

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

PHP 5.4.44 版
[root@localhost www5.4.44]# time /usr/local/php5.4.44/bin/php search_by_key.phpreal    0m0.351s
user    0m0.300s
sys     0m0.050sPHP 5.5.28 版
[root@localhost www]# time /usr/local/php/bin/php search_by_key.phpreal    0m0.361s
user    0m0.304s
sys     0m0.057sPHP 7.0.0 版
[root@localhost www7]# time /usr/local/php7/bin/php search_by_key.phpreal    0m0.114s
user    0m0.097s
sys     0m0.017s

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

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

opcache.memory_consumption=128opcache.interned_strings_buffer=8opcache.max_accelerated_files=4000opcache.revalidate_freq=60opcache.fast_shutdown=1opcache.enable_cli=1

You can also disableopcache.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# 加入zend_extension=/usr/local/php7/lib/php/extensions/no-debug-non-zts-20141001/opcache.so

Restart

# killall php-fpm#  /etc/init.d/php-fpm

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