步骤1、安装环境准备
操作系统版本：centos 7
php版本：php-7.4.16
先安装一些依赖库
yum -y install gcc*
yum -y install libcurl-devel sqlite-devel libxml2-devel
yum -y install libxml2 libxml2-devel openssl openssl-devel bzip2 bzip2-devel libcurl libcurl-devel libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel gmp gmp-devel libmcrypt libmcrypt-devel readline readline-devel libxslt libxslt-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel ncurses curl gdbm-devel db4-devel libXpm-devel libX11-devel gd-devel gmp-devel expat-devel xmlrpc-c xmlrpc-c-devel libicu-devel libmcrypt-devel libmemcached-devel
步骤2、下载php压缩包，解压后进入到目录下
cd /usr/local
tar -zxvf php-7.4.16.tar.gz
步骤3、编译安装,直接把常用的扩展安装好,免得后面在一个一个安装(推荐)
./configure –prefix=/usr/local/php –with-curl –with-freetype –enable-gd –with-jpeg –with-gettext –with-gmp –with-mysqli –with-openssl –with-pdo-mysql –with-pear –with-xmlrpc –with-xsl –with-mhash –enable-fpm –enable-bcmath –enable-mbstring –enable-sockets –enable-xml –enable-embed –enable-phpdbg –with-bz2 –enable-calendar –with-curl –enable-exif –enable-ftp –enable-pcntl –with-zlib –with-readline –enable-shmop –enable-sockets
看到如下信息则编译成功（如果报错可以删除一些不需要扩展）
+——————————————————————–+
| 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.
步骤4、make安装
make && make install
步骤5.安装成功之后，设置环境变量
vi /etc/profile
PATH=$PATH:/usr/lcoal/php/bin
export PATH
立即生效
source /etc/profile
步骤6. 测试查看PHP版本
php -v
php -m 查看一些扩展模块