TYPO3 Core

The Install Tool warns about missing PHP extensions. Among them is not the PDO extension which is also required.

This leads to a stop during the installation.
Only the PHP error_log file gives a hint what is missing.

[12-Apr-2019 19:21:44 UTC] PHP Fatal error:  Uncaught Error: Class 'PDO' not found in /var/www/html/typo3_src-9.5.5/vendor/doctrine/dbal/lib/Doctrine/DBAL/DriverManager.php:181
Stack trace:
#0 /var/www/html/typo3_src-9.5.5/typo3/sysext/core/Classes/Database/ConnectionPool.php(153): Doctrine\DBAL\DriverManager::getConnection(Array)
#1 /var/www/html/typo3_src-9.5.5/typo3/sysext/core/Classes/Database/ConnectionPool.php(128): TYPO3\CMS\Core\Database\ConnectionPool->getDatabaseConnection(Array)
#2 /var/www/html/typo3_src-9.5.5/typo3/sysext/core/Classes/Database/ConnectionPool.php(82): TYPO3\CMS\Core\Database\ConnectionPool->getConnectionByName('Default')
#3 /var/www/html/typo3_src-9.5.5/typo3/sysext/core/Classes/Error/AbstractExceptionHandler.php(98): TYPO3\CMS\Core\Database\ConnectionPool->getConnectionForTable('sys_log')
#4 /var/www/html/typo3_src-9.5.5/typo3/sysext/core/Classes/Error/AbstractExceptionHandler.php(85): TYPO3\CMS\Core\Error\AbstractExceptionHandler->writeLog('Core: Exception...')
#5 /var/www/html/typo3_src-9.5.5/typo3/sysext/core/Classes/Err in /var/www/html/typo3_src-9.5.5/vendor/doctrine/dbal/lib/Doctrine/DBAL/DriverManager.php on line 181