data base connect failed.
<br />
<b>Fatal error</b>:  Uncaught TypeError: pg_query(): Argument #1 ($connection) must be of type PgSql\Connection, bool given in /var/www/html/get_title.php:9
Stack trace:
#0 /var/www/html/get_title.php(9): pg_query(false, 'select sel,nen,...')
#1 /var/www/html/school.php(152): require_once('/var/www/html/g...')
#2 {main}
  thrown in <b>/var/www/html/get_title.php</b> on line <b>9</b><br />