Install php5.5.9 on Ubuntu 20.04

ubuntu2002_php559.sh

apt -y install build-essential libxml2-dev libxslt1-dev 
apt -y install libfcgi-dev libfcgi0ldbl libjpeg62-dbg libxml2-dev
apt -y install libmcrypt-dev libssl-dev libc-client2007e libc-client2007e-dev
apt -y install libbz2-dev libcurl4-openssl-dev libjpeg-dev
apt -y install libfreetype6-dev libkrb5-dev libpq-dev libicu-dev

ln -s /usr/lib/libc-client.a /usr/lib/x86_64-linux-gnu/libc-client.a

mkdir /opt/php-5.5.9
mkdir /usr/local/src/php5-build
cd /usr/local/src/php5-build
wget http://us2.php.net/distributions/php-5.5.9.tar.bz2
tar -xvf php-5.5.9.tar.bz2

cd /usr/include
ln -s x86_64-linux-gnu/curl

cd /usr/local/src/php6-build/php-5.5.9
./configure --prefix=/opt/php-5.5.9 --with-pdo-pgsql --with-zlib-dir --with-freetype-dir --enable-mbstring \
--with-libxml-dir=/usr --enable-soap --enable-intl --enable-calendar --with-curl --with-mcrypt --with-zlib \
--with-gd --with-pgsql --disable-rpath --enable-inline-optimization --with-bz2 --with-zlib --enable-sockets \
--enable-sysvsem --enable-sysvshm --enable-pcntl --enable-mbregex --enable-exif --enable-bcmath --with-mhash \
--enable-zip --with-pcre-regex --with-mysql --with-pdo-mysql --with-mysqli --with-jpeg-dir=/usr --with-png-dir=/usr \
--enable-gd-native-ttf --with-fpm-user=www-data --with-fpm-group=www-data \
--with-libdir=/lib/x86_64-linux-gnu --enable-ftp --with-imap --with-imap-ssl --with-gettext --with-xmlrpc --with-xsl \
--with-kerberos --enable-fpm 

make
make install

cp /usr/local/src/php5-build/php-5.5.9/php.ini-production /opt/php-5.5.9/lib/php.ini
cp /opt/php-5.5.9/etc/php-fpm.conf.default /opt/php-5.5.9/etc/php-fpm.conf
mkdir /opt/php-5.5.9/etc/php-fpm.d

echo "[Unit]
Description=The PHP 5.5.9 FastCGI Process Manager
After=network.target
[Service]
Type=simple
PIDFile=/opt/php-5.5.9/var/run/php-fpm.pid
ExecStart=/opt/php-5.5.9/sbin/php-fpm --nodaemonize --fpm-config /opt/php-5.5.9/etc/php-fpm.conf
ExecReload=/bin/kill -USR2 $MAINPID
[Install]
WantedBy=multi-user.target" >> /lib/systemd/system/php-5.5.9-fpm.service

echo 'zend_extension=opcache.so' >> /opt/php-5.5.9/lib/php.ini

for i in /opt/php-5.5.9/lib/php.ini;do
sed -i 's|max_execution_time = 30|max_execution_time = 120|' $i
sed -i 's|upload_max_filesize = 2M|upload_max_filesize = 512M|' $i
sed -i 's|post_max_size = 8M|post_max_size = 128M|' $i
sed -i 's|error_reporting = E_ALL & ~E_DEPRECATED|error_reporting =  E_ERROR|' $i
sed -i 's|short_open_tag = Off|short_open_tag = On|' $i
sed -i "s|;date.timezone =|date.timezone = 'Europe\/Budapest'|" $i
done


### Change PHP-FPM Config
sed -i "s|;pid = run/php-fpm.pid|pid = run/php-fpm.pid|" /opt/php-5.5.9/etc/php-fpm.conf
sed -i "s|listen = 127.0.0.1:9000|listen = 127.0.0.1:8989|" /opt/php-5.5.9/etc/php-fpm.conf
sed -i "s|;include=etc/fpm.d/\*.conf|include=/opt/php-5.5.9/etc/php-fpm.d/\*.conf|" /opt/php-5.5.9/etc/php-fpm.conf


systemctl enable php-5.5.9-fpm.service
systemctl daemon-reload
systemctl start php-5.5.9-fpm.service

a2enmod proxy_fcgi
systemctl restart apache2

mkdir /var/lib/php5-fpm

echo "[default]
listen = /var/lib/php5-fpm/default.sock
listen.owner = www-data
listen.group = www-data
listen.mode = 0660
user = www-data
group = www-data
pm = dynamic
pm.max_children = 10
pm.start_servers = 2
pm.min_spare_servers = 1
pm.max_spare_servers = 5
pm.max_requests = 0
chdir = /
env[HOSTNAME] = $HOSTNAME
env[TMP] = /var/www/tmp
env[TMPDIR] = /var/www/tmp
env[TEMP] = /var/www/tmp
env[PATH] = /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
php_admin_value[open_basedir] = /var/www/html:/var/www/tmp:/tmp
php_admin_value[session.save_path] = /var/www/tmp
php_admin_value[upload_tmp_dir] = /var/www/tmp" >> /opt/php-5.5.9/etc/php-fpm.d/default.conf

### PHP support for vhost (/etc/apache2/sites-enabled/000-default.conf)
<VirtualHost *:80>
...
<IfModule mod_proxy_fcgi.c>
        <Directory /var/www/html>
                <FilesMatch "\.php[345]?$">
                        SetHandler "proxy:unix:/var/lib/php5-fpm/default.sock|fcgi://localhost"
                </FilesMatch>
        </Directory>
</IfModule>
...
</VirtualHost>

systemctl restart php-5.5.9-fpm
systemctl restart apache2

go figure, it dies on --enable-openssl also - it seems to want older versions with known vulnerabilities.