# Comment out all load_from_slave entries in env.php
PERL_COMMANDS=$(cat <<'PERL_HEREDOC'
s/^(\s*)(?='load_from_slave')(.*)$/$1#$2/;print
PERL_HEREDOC
)
ENV_PHP=$(cat app/etc/env.php | perl -nle ${PERL_COMMANDS})
echo "${ENV_PHP}" > app/etc/env.php

# Uncomment all load_from_slave entries in env.php
PERL_COMMANDS=$(cat <<'PERL_HEREDOC'
s/^(\s*)(#)(\s*)(?='load_from_slave')(.*)$/$1$3$4/;print
PERL_HEREDOC
)
ENV_PHP=$(cat app/etc/env.php | perl -nle ${PERL_COMMANDS})
echo "${ENV_PHP}" > app/etc/env.php