install oracle oci8 on ubuntu 20.4 and php 7.4

oci8_ubuntu20.4_php74.md

as root:

1. create mkdir /opt/oracle && cd /opt/oracle and cd into it
2. from repository site/master -> .docker/ copy instantclient-basic-linux.x64-12.1.0.2.0.zip && instantclient-sdk-linux.x64-12.1.0.2.0.zip
3. unzip and create the symlinks:

  unzip /opt/oracle/instantclient-basic-linux.x64-12.1.0.2.0.zip -d /opt/oracle \
  && unzip /opt/oracle/instantclient-sdk-linux.x64-12.1.0.2.0.zip -d /opt/oracle \
  && ln -s /opt/oracle/instantclient_12_1/libclntsh.so.12.1 /opt/oracle/instantclient_12_1/libclntsh.so \
  && ln -s /opt/oracle/instantclient_12_1/libclntshcore.so.12.1 /opt/oracle/instantclient_12_1/libclntshcore.so \
  && ln -s /opt/oracle/instantclient_12_1/libocci.so.12.1 /opt/oracle/instantclient_12_1/libocci.so \
  && rm -rf /opt/oracle/*.zip

4. put the oracle path on environment:

  echo LD_LIBRARY_PATH=\"/opt/oracle/instantclient_12_1\" >> /etc/environment
  echo /opt/oracle/instantclient_12_1/ > /etc/ld.so.conf.d/zz_php_oci8.conf
  ldconfig

5. install php extension using pecl: echo 'instantclient,/opt/oracle/instantclient_12_1/' | pecl install oci8-2.2.0
6. enable it on php.ini as oci extension (double check if you are editing the right php.ini)
7. reload services