我之前在MacOS编译安装php7.4过，这一次也记录一下在centOS上的安装过程吧：
# 下载PHP7.4最新版
wget https://www.php.net/distributions/php-7.4.8.tar.bz2
tar -jxvf php-7.4.8.tar.bz2 && cd php-7.4.8
# 配置，已经按照wordpress所需要的和建议的扩展选择，由于我不会用到sqlite3，所以加上了`--without-sqlite3`和`--without-pdo-sqlite`
# 有些参数不是必须的，比如如果你不需要使用opcache，那可以把`--enable-opcache`去掉
./configure \
--prefix=/usr/local/opt/php@7.4 \
--with-config-file-path=/usr/local/etc/php/7.4 \
--with-config-file-scan-dir=/usr/local/etc/php/7.4/conf.d \
--localstatedir=/var \
--with-readline \
--enable-fpm \
--with-fpm-user=apache \
--with-fpm-group=apache \
--enable-intl \
--enable-mbstring \
--enable-pcntl \
--with-mysqli \
--with-zlib \
--with-openssl \
--enable-mysqlnd \
--enable-gd \
--with-curl \
--enable-exif \
--with-zip \
--enable-opcache \
--without-sqlite3 \
--without-pdo-sqlite安装libzip和libzip-devel：
//安装libzip
wget http://packages.psychotic.ninja/7/plus/x86_64/RPMS//libzip-0.11.2-6.el7.psychotic.x86_64.rpm
yum localinstall libzip-0.11.2-6.el7.psychotic.x86_64.rpm
//安装libzip-devel
wget http://packages.psychotic.ninja/7/plus/x86_64/RPMS//libzip-devel-0.11.2-6.el7.psychotic.x86_64.rpm
yum localinstall libzip-devel-0.11.2-6.el7.psychotic.x86_64.rpm报错：
configure: error: Package requirements (libcurl >= 7.15.5) were not met:
No package 'libcurl' found
...解决办法：
yum install -y libcurl-devel报错：
configure: error: Package requirements (libpng) were not met:
No package 'libpng' 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 PNG_CFLAGS
and PNG_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details解决办法：
yum install -y libpng libpng-devel报错：
configure: error: Package requirements (openssl >= 1.0.1) were not met:
No package 'openssl' 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 OPENSSL_CFLAGS
and OPENSSL_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.安装：
yum install -y openssl openssl-devel openssl-libs报错：
configure: error: Package requirements (oniguruma) were not met:
No package 'oniguruma' 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 ONIG_CFLAGS
and ONIG_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
那我们就安装它：
git clone git@github.com:kkos/oniguruma.git
cd oniguruma
# oniguruma需要以下package才能config
yum install -y autoreconf automake libtool
./autogen.sh && ./configure --prefix=/usr
make && make install设置这个变量：
export PKG_CONFIG_PATH="/usr/lib/pkgconfig"回到PHP的源码目录后继续执行上面的configure
发现配置OK！最后make：
make && make install发现无法使用交互模式，即/usr/local/opt/php@7.4/bin/php -a会出现“Interactive mode enabled”，然后卡住。网上查了一下，发现是缺少一个插件叫“readline”，可以看官方的介绍：https://www.php.net/manual/en/features.commandline.interactive.php
安装readline:
yum install readline-devel 再次尝试config，最后没有报错，开始build：
make && make install这次OK了！
交互模式也有了：
➔ /usr/local/opt/php@7.4/bin/php -a
Interactive mode enabled
php >其他一些操作：
cp php.ini-* /usr/local/etc/php/7.4
cp /usr/local/etc/php/7.4/php.ini-production /usr/local/etc/php/7.4/php.ini
cp -r /usr/local/opt/php@7.4/etc/php-fpm.* /usr/local/etc/php/7.4
cp /usr/local/etc/php/7.4/php-fpm.conf.default /usr/local/etc/php/7.4/php-fpm.conf
cp /usr/local/etc/php/7.4/php-fpm.d/www.conf.default /usr/local/etc/php/7.4/php-fpm.d/www.conf启动php-fpm:
/usr/local/opt/php@7.4/sbin/php-fpm -y /usr/local/etc/php/7.4/php-fpm.conf使用systemd控制php-fpm：
新建service: /usr/lib/systemd/system/php-fpm@7.4.service
[Unit]
Description=The PHP FastCGI Process Manager
After=syslog.target network.target remote-fs.target nss-lookup.target
[Service]
Type=forking
PIDFile=/var/run/php-fpm@7.4.pid
EnvironmentFile=/etc/sysconfig/php-fpm
ExecStart=/usr/local/opt/php@7.4/sbin/php-fpm --fpm-config /usr/local/etc/php/7.4/php-fpm.conf
ExecReload=/bin/kill -USR2 $MAINPID
ExecStop=/bin/kill -s QUIT $MAINPID
Restart=on-failure
[Install]
WantedBy=multi-user.target执行命令：
# 退出php-fpm
kill -s QUIT $(cat /var/run/php-fpm@7.4.pid)
systemctl start php-fpm@7.4
systemctl enable php-fpm@7.4开启opcache（可选）
编辑 /usr/local/etc/php/7.4/php.ini
# 末尾加入
zend_extension=opcache.so
# 修改
opcache.enable=1