sudo apt-get update

sudo apt-get install autoconf

sudo apt-get install libxml2-dev

sudo apt-get install bzip2

sudo apt-get install libjpeg-dev

sudo apt-get install libpng-dev

sudo apt-get install libxpm-dev

sudo apt-get install libmcrypt-dev

sudo apt-get install libMysqL++-dev

sudo apt-get install libxslt1-dev

sudo apt-get install libbz2-dev

sudo apt-get install libcurl4-openssl-dev

sudo apt-get install libcurl4-gnutls-dev

sudo apt-get install libfreetype6-dev

sudo apt-get install build-essential

sudo apt-get install openssl

sudo apt-get install libssl-dev

sudo apt-get install make

sudo apt-get install curl

sudo apt-get install libreadline6

sudo apt-get install libreadline6-dev

sudo apt-get install libt1-dev

tar -xvf PHP-7.1.8.tar.gz

sudo mv PHP-7.1.8 /usr/local/src/

cd /usr/local/src/PHP-7.1.8

sudo cp /usr/lib/x86_64-linux-gnu/libssl.so /usr/libsudo ./configure --prefix=/usr/local/PHP --with-apxs2=/usr/local/apache2/bin/apxs -with-MysqLi=/usr/local/MysqL/bin/MysqL_config --with-MysqLi=MysqLnd --with-pdo-MysqL=MysqLnd --with-iconv-dir=/usr/local/lib --with-openssl --enable-mbstring --enable-ftp --enable-pcntl --enable-sysvmsg --enable-sysvsem --enable-sysvshm --enable-zip --enable-sockets --enable-MysqLnd --enable-maintainer-zts --with-tsrm-pthreads

sudo make

sudo make install

sudo sudo cp /usr/local/src/PHP-7.1.8/PHP.ini-production /usr/local/PHP/lib/PHP.ini

AddType application/x-httpd-PHP .PHP

AddType application/x-httpd-PHP-source .PHPs

#cd /usr/src/PHP-5.3.6/ext/mbstring

#/usr/local/PHP/bin/PHPize

#./configure --with-PHP-config=/usr/local/PHP/bin/PHP-config

#make && make install

PHP.ini里增加extension=mbstring.so，并设置extension_dir = "/usr/local/PHP/lib/PHP/extensions/no-debug-non-zts-2006061

#/usr/local/apache2/bin/apachectl restart