php7的安装
wget http://am1.php.net/get/php-7.0.4.tar.gz/from/this/mirror tar zvxf php-7.0.4.tar.gz cd php-7.0.4 ./configure --prefix=/data/php7 --with-config-file-path=/data/php7/etc --with-icu-dir=/usr --with-xsl --enable-fpm --with-fpm-user=www-data --with-fpm-group=www-data --enable-mysqlnd --with-mysqli=mysqlnd --with-pdo-mysql=mysqlnd --with-iconv-dir --with-freetype-dir=/usr/local/freetype --with-jpeg-dir --with-png-dir --with-zlib --with-libxml-dir=/usr --enable-xml --disable-rpath --enable-bcmath --enable-shmop --enable-sysvsem --enable-inline-optimization --with-curl --enable-mbregex --enable-mbstring --enable-intl --enable-pcntl --with-mcrypt --enable-ftp --with-gd --enable-gd-native-ttf --with-openssl --with-mhash --enable-pcntl --enable-sockets --with-xmlrpc --enable-zip --enable-soap --with-gettext --enable-fileinfo --enable-opcache --with-xsl
1、出现错误：
Unable to detect ICU prefix or no failed. Please verify ICU install prefix and make sure icu-config works.
解决方法：
yum install -y icu libicu libicu-devel configure參数添加 --with-icu-dir=/usr
2、出现故障：
configure: error: mcrypt.h not found. Please reinstall libmcrypt.
解决方法：
wget http://softlayer.dl.sourceforge.net/sourceforge/mcrypt/libmcrypt-2.5.8.tar.gz tar -zxvf libmcrypt-2.5.8.tar.gz cd /usr/local/src/libmcrypt-2.5.8 ./configure make make install
3问题：
configure: error: xslt-config not found. Please reinstall the libxslt >= 1.1.0 distribution
解决：
yum install -y libxslt libxslt-devel libxml2 libxml2-devel configure加上--with-xsl
出问题解决站点：https://teddysun.com/363.html（非广告哈，确实帮我大忙了）
假设make时候出现liconv相关错误。可进行一下操作
vim Makefile 找到 EXTRA_LIBS 添加 -liconv
make && make install
php.ini文件和php-fpm.conf文件生成。
cp php.ini-production /usr/local/php7/etc/php.ini cd /usr/src/php-7.0.4/sapi/fpm cp init.d.php-fpm /etc/init.d/php-fpm chmod +x /etc/init.d/php-fpm chkconfig --add php-fpm chkconfig php-fpm on
为了php7性能再次提升，能够參考鸟哥博客http://www.laruence.com/2015/12/04/3086.html
discuz的php7版本号，由于博主第一次做开源。所以里面的redme文档没有写。
代码地址：https://code.csdn.net/zzh787272581/dz-yboard-cn/tree/master（代码仅仅能在php7同意，原因在后面有说明）
里面主要改动点：
1、将eval去掉。这里不针对php7去改动，仅仅是博主认为这个函数在线上server不安全。
2、将preg_replace带有/e 修饰符所有替换成preg_replace_callback 函数，将preg_replace里面数组形式替换成preg_replace_callback_array;这里由于用了preg_replace_callback_array,仅仅能在php7下执行。
3、有一些地方写死了mysql的函数，这里将所有替换成mysqli的函数进行书写。
最后贴一张php5.4和php7以下dz首页的ab压測图。机器不好。所以qps不是非常好看。
都是用 ab -n 500 -c http://dz.yboard.cn/
php7
C:UsersAdministrator>ab -n 100 -c 100 http://dz.yboard.cn/
This is ApacheBench, Version 2.3 <$Revision: 1604373 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking dz.yboard.cn (be patient).....done
Server Software: nginx
Server Hostname: dz.yboard.cn
Server Port: 80
Document Path: /
Document Length: 0 bytes
Concurrency Level: 100
Time taken for tests: 0.182 seconds
Complete requests: 100
Failed requests: 0
Non-2xx responses: 100
Total transferred: 19100 bytes
HTML transferred: 0 bytes
Requests per second: 550.36 [#/sec] (mean)
Time per request: 181.700 [ms] (mean)
Time per request: 1.817 [ms] (mean, across all concurrent requests)
Transfer rate: 102.65 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 1 1.0 1 5
Processing: 11 100 52.8 107 168
Waiting: 3 96 54.5 102 167
Total: 12 102 52.4 109 168
Percentage of the requests served within a certain time (ms)
50% 109
66% 147
75% 153
80% 155
90% 162
95% 165
98% 167
99% 168
100% 168 (longest request)php5.4.45
C:UsersAdministrator>ab -n 100 -c 100 http://dz-php5.yboard.cn/
This is ApacheBench, Version 2.3 <$Revision: 1604373 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking dz-php5.yboard.cn (be patient).....done
Server Software: nginx
Server Hostname: dz-php5.yboard.cn
Server Port: 80
Document Path: /
Document Length: 0 bytes
Concurrency Level: 100
Time taken for tests: 0.222 seconds
Complete requests: 100
Failed requests: 0
Non-2xx responses: 100
Total transferred: 17700 bytes
HTML transferred: 0 bytes
Requests per second: 450.15 [#/sec] (mean)
Time per request: 222.150 [ms] (mean)
Time per request: 2.221 [ms] (mean, across all concurrent requests)
Transfer rate: 77.81 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 1 1.4 1 5
Processing: 76 122 16.8 127 145
Waiting: 76 121 16.6 127 144
Total: 77 123 16.2 129 145
Percentage of the requests served within a certain time (ms)
50% 129
66% 132
75% 134
80% 135
90% 140
95% 143
98% 145
99% 145
100% 145 (longest request)总的来说，性能还是有非常大提升的。
欢迎各位同学直接拿来測试使用。假设有问题欢迎提出，我会一直维护这个php7版本号，可私下联系我QQ:787272581