一、下载
1、https://www.php.net/distributions/php-8.0.0.tar.gz下载到本地，文件传输上传到 /usr/local/src/
2、wget -P /usr/local/src/ https://www.php.net/distributions/php-8.0.0.tar.gz
二、解压、编译、安装
1、解压缩
> cd /usr/local/src/
> tar xzf php-8.0.0.tar.gz
> cd php-8.0.02、配置编译参数，参考https://www.php.net/manual/zh... 选择自己需要的选项
./configure --prefix=/usr/local/php8 --with-config-file-path=/usr/local/php8/etc --with-fpm-user=www --with-fpm-group=www --with-curl --with-openssl --with-mysqli --with-pdo-mysql --with-iconv --with-mhash --with-zlib --enable-mbstring --enable-gd --enable-gd-jis-conv --enable-sockets --enable-fpm --enable- --enable-xml --enable-pdo --enable-cli --enable-pcntl --enable-soap --enable-opcache --enable-fileinfo --disable-rpath --enable-mysqlnd --with-zip --enable-simplexml --with-libxml --with-sqlite3 --with-pdo-sqlite --enable-phar --enable-tokenizer --enable-cgi问题1：
configure: error: Package requirements (libxml-2.0 >= 2.9.0) were not met:
Package 'libxml-2.0', required by 'virtual:world', not found
Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.
Alternatively, you may set the environment variables LIBXML_CFLAGS
and LIBXML_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.问题1解决：
> yum install libxml2-devel问题2：
configure: error: Package requirements (sqlite3 > 3.7.4) were not met:问题2解决：
> yum install sqlite-devel问题3：
configure: error: Package requirements (libcurl >= 7.29.0) were not met:问题3解决：
> yum install libcurl-devel问题4：
configure: error: Package requirements (libpng) were not met:问题4解决：
> yum install libpng libpng-devel问题5：
configure: error: Package requirements (oniguruma) were not met:问题5解决：
> cd /usr/local/src/
> wget http://ftp.altlinux.org/pub/distributions/ALTLinux/Sisyphus/x86_64/RPMS.classic/liboniguruma5-6.9.6-alt1.x86_64.rpm -O liboniguruma5-6.9.6-alt1.x86_64.rpm
> rpm -ivh liboniguruma5-6.9.6-alt1.x86_64.rpm
> wget http://ftp.altlinux.org/pub/distributions/ALTLinux/Sisyphus/x86_64/RPMS.classic/liboniguruma-devel-6.9.6-alt1.x86_64.rpm -O liboniguruma-devel-6.9.6-alt1.x86_64.rpm
> rpm liboniguruma-devel-6.9.6-alt1.x86_64.rpmcli问题6：
configure: error: Package requirements (libzip >= 0.11 libzip != 1.3.1 libzip != 1.7.0) were not met:问题6解决：
> yum install libzip libzip-devel 配置编译参数成功
+--------------------------------------------------------------------+
| License: |
| This software is subject to the PHP License, available in this |
| distribution in the file LICENSE. By continuing this installation |
| process, you are bound by the terms of this license agreement. |
| If you do not agree with the terms of this license, you must abort |
| the installation process at this point. |
+--------------------------------------------------------------------+
Thank you for using PHP.3、编译源码
> make -j2 # 这里是依赖系统cpu核心数进行编译，对性能有一定提升，通常利用核心数不要超过一半，4、安装
make install安装成功
[root@54skyer php-8.0.0]# make install
Installing shared extensions: /usr/local/php8/lib/php/extensions/no-debug-non-zts-20200930/
Installing PHP CLI binary: /usr/local/php8/bin/
Installing PHP CLI man page: /usr/local/php8/php/man/man1/
Installing PHP FPM binary: /usr/local/php8/sbin/
Installing PHP FPM defconfig: /usr/local/php8/etc/
Installing PHP FPM man page: /usr/local/php8/php/man/man8/
Installing PHP FPM status page: /usr/local/php8/php/php/fpm/
Installing phpdbg binary: /usr/local/php8/bin/
Installing phpdbg man page: /usr/local/php8/php/man/man1/
Installing PHP CGI binary: /usr/local/php8/bin/
Installing PHP CGI man page: /usr/local/php8/php/man/man1/
Installing build environment: /usr/local/php8/lib/php/build/
Installing header files: /usr/local/php8/include/php/
Installing helper programs: /usr/local/php8/bin/
program: phpize
program: php-config
Installing man pages: /usr/local/php8/php/man/man1/
page: phpize.1
page: php-config.1
/usr/local/src/php-8.0.0/build/shtool install -c ext/phar/phar.phar /usr/local/php8/bin/phar.phar
ln -s -f phar.phar /usr/local/php8/bin/phar
Installing PDO headers: /usr/local/php8/include/php/ext/pdo/5、添加环境变量
> vim /etc/profile # 在文件末尾加入
# PATH=$PATH:/usr/local/php8/bin/
# export PATH
# :wq 保存并退出
> source /etc/profile # 立刻生效配置
> php -v # 获得如下信息
php -v
PHP 8.0.0 (cli) (built: Dec 15 2020 02:46:59) ( NTS )
Copyright (c) The PHP Group
Zend Engine v4.0.0-dev, Copyright (c) Zend Technologies6、配置fpm
// 复制php.ini到编译配置参数指定的目录。php.ini在解压的源码目录里
cp /usr/local/src/php-8.0.0/php.ini-production /usr/local/php8/etc/php.ini
// 复制一份php-fpm的配置模版文件到同级目录 方便备份和修改
cp /usr/local/php8/etc/php-fpm.conf.default /usr/local/php8/etc/php-fpm.conf
// 复制一份php-fpm的扩展配置模板文件到同级目录 方便备份和修改
cp /usr/local/php8/etc/php-fpm.d/www.conf.default /usr/local/php8/etc/php-fpm.d/www.conf
// 复制开启自起脚本到系统启动自动加载脚本目录。fpm/init.d.php-fpm在解压的源码目录里
cp /usr/local/src/php-8.0.0/sapi/fpm/init.d.php-fpm /etc/init.d/php-fpm
// 使开机自起脚本可被任何权限角色执行
chmod +x /etc/init.d/php-fpm7、额外说明
关于配置文件的一些说明 参考：https://www.cnblogs.com/xiaozong/p/5724984.html
php-fpm.conf是PHP-FPM特有的配置文件
php.ini是所有php模式中必须的配置文件
两者的区别是，php-fpm.conf是PHP-FPM进程管理器的配置文件，php.ini是PHP解析器的配置文件
有的PHP版本的配置文件路径中还有/fpm.d/www.conf配置文件
这是php-fpm.conf配置的文件的扩展文件，可以打开php-fpm.conf文件查看
; include=fpm.d/*.conf
我们可以使用php-fpm.conf配置慢日志
我们是可以开启慢日志功能的。
slowlog = /usr/local/var/log/php-fpm.log.slow
request_slowlog_timeout = 5s