【参考】

参考：https://blog.csdn.net/wwzuizz/article/details/89175941
参考：https://blog.csdn.net/dmedaa/article/details/89863165
参考：https://blog.csdn.net/chhnang2016/article/details/81010227
参考：https://blog.csdn.net/gooding300/article/details/86545919

【安装】

各种依赖包：

sudo apt update
sudo apt -y install openssl
sudo apt -y install libssl-dev
sudo apt -y install curl
sudo apt -y install libcurl4-openssl-dev
sudo apt -y install libcurl4-gnutls-dev
sudo apt -y install libbz2-dev
sudo apt -y install libzip-dev
sudo apt -y install libxpm-dev
sudo apt -y install libxml2-dev
sudo apt -y install libjpeg-dev
sudo apt -y install libpng-dev
sudo apt -y install libfreetype6-dev
sudo apt -y install libmcrypt-dev
sudo apt -y install libmysql++-dev
sudo apt -y install libxslt1-dev
sudo apt -y install libc-client-dev
sudo apt -y install libkrb5-dev
sudo apt -y install libsodium-dev

下载解压 PHP 源码包，并编译：

sudo apt update && apt -y install openssl && sudo apt -y install libssl-dev && sudo apt -y install curl && sudo apt -y install libcurl4-openssl-dev && sudo apt -y install libcurl4-gnutls-dev && sudo apt -y install libbz2-dev && sudo apt -y install libzip-dev && sudo apt -y install libxpm-dev && sudo apt -y install libxml2-dev && sudo apt -y install libjpeg-dev && sudo apt -y install libpng-dev && sudo apt -y install libfreetype6-dev && sudo apt -y install libmcrypt-dev && sudo apt -y install libmysql++-dev && sudo apt -y install libxslt1-dev && sudo apt -y install libc-client-dev && sudo apt -y install libkrb5-dev && sudo apt -y install libsodium-dev
wget http://us2.php.net/distributions/php-7.3.14.tar.xz && tar -xvf php-7.3.14.tar.xz && cd php-7.3.14
./configure --prefix=/usr/local/php --with-config-file-path=/usr/local/php/etc --enable-fpm --with-mysqli --with-pdo-mysql --with-iconv-dir --with-freetype-dir --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-ftp --with-gd --with-openssl --with-mhash --enable-pcntl --enable-sockets --enable-zip --enable-soap --without-pear --with-gettext --enable-maintainer-zts  --with-apxs2=/usr/local/apache2/bin/apxs  --with-kerberos --with-imap --with-imap-ssl --with-xmlrpc --with-bz2 --with-xsl -with-sodium
make -j8 && make install

【配置】

创建软连接：

ln -s /usr/local/php/bin/php /usr/local/bin/ && ln -s /usr/local/php/bin/phpize /usr/local/bin/ && ln -s /usr/local/php/bin/php-config /usr/local/bin/

php 配置文件：

cp /root/php-7.3.14/php.ini-production /usr/local/php/etc/php.ini

php-fpm 配置文件：

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

查看版本：

php -v

输出：

PHP 7.3.14 (cli) (built: Jan  7 2020 02:40:00) ( ZTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.13, Copyright (c) 1998-2018 Zend Technologies

【扩展】

参考：https://amon.org/php-ioncube

参考：https://amon.org/php-imap

参考：https://amon.org/php-xmlrpc

参考：https://amon.org/php-opcache

[curl]
; A default value for the CURLOPT_CAINFO option. This is required to be an
; absolute path.
; curl.cainfo =
; curl.cainfo="/usr/local/php/etc/extras/ssl/ca-bundle.crt"

; Local Variables:
; tab-width: 4
; End:

track_errors=Off

; [ionCube Loader]
; zend_extension=/usr/local/ioncube/ioncube_loader_lin_7.3_ts.so

; [gd]
; extension = "gd.so"

; [imap]
; extension = "imap.so"

; [xmlrpc]
; extension = "xmlrpc.so"

; [intl]
; extension = "intl.so"

; [imagick]
; extension = "imagick.so"

; [redis]
;extension = "redis.so"

; [memcached]
;extension = "memcached.so"

; [opcache]
; zend_extension = "opcache.so"
opcache.memory_consumption=128
opcache.interned_strings_buffer=8
opcache.max_accelerated_files=4000
opcache.revalidate_freq=60
opcache.fast_shutdown=1
opcache.enable_cli=1

报错：PHP Startup: Invalid library (maybe not a PHP library) ‘xmlrpc.so’ in Unknown on line 0

参考：https://blog.csdn.net/tianfuhao123/article/details/89073168

这种情况一般发生在php7及以上,因为 已经把扩展编译到 PHP 里了，无需再需要额外单独添加扩展。