If there are some blanks in the define sentence or more than one define sentence in one line in the config.php (for example define('CONF_DATABASE_PORT', '5432'))，the defined value would not be got in the install.php, because the preg_match function(about line 350 in install.php) would fail.
If there are some blanks in the define sentence or more than one define sentence in one line in the config.php (for example define('CONF_DATABASE_PORT', '5432'))，the defined value would not be got in the install.php, because the preg_match function(about line 350 in install.php) would fail.