Set session.save_path ini setting in CI

.github/workflows/tests.yml

@@ -40,12 +40,14 @@ jobs:
       uses: shivammathur/setup-php@v2
       with:
         php-version: 7.4
+        ini-values: session.save_path=${{ github.workspace }}/tmp/php_sessions
         extensions: mbstring, xml, ctype, iconv, intl, pdo_sqlite, mysql, pdo_mysql
 
     - name: Set SYMFONY_ENV to test
       run: echo "SYMFONY_ENV=test" >> $GITHUB_ENV
 
     - name: Install Apache
+      # We need the sed command at the bottom to set the PHP session save path to a directory that's writable for PHP
       run: |
         sudo add-apt-repository ppa:ondrej/php -y
         sudo add-apt-repository ppa:ondrej/apache2 -y
@@ -54,6 +56,7 @@ jobs:
         sudo cp ./.github/workflows/mautic-apache.conf /etc/apache2/conf-available/mautic.conf
         sudo a2enconf mautic
         sudo service apache2 restart
+        sed -i 's,^;session.save_path =.*$,session.save_path = "${{ github.workspace }}/tmp/php_sessions",' php.ini
 
     - name: Install dependencies
       run: |