Can't open sqlite db

[NotionCommotion]

Running php7 on centos7 and get error PHP Fatal error:  Uncaught PDOException: SQLSTATE[HY000] [14] unable to open database file.

 

db.sqlite3 as well as the folder containing it has write permission by Apache.

<?php
$x=new PDO('sqlite: db.sqlite3');

phpinfo() provides the following:

 

Additional .ini files parsed ... /etc/php.d/20-sqlite3.ini, ..., /etc/php.d/30-pdo_sqlite.ini, /etc/php.d/30-wddx.ini, /etc/php.d/30-xmlreader.ini, /etc/php.d/30-xmlrpc.ini, /etc/php.d/40-zip.ini
...


PDO support enabled
PDO drivers mysql, sqlite
pdo_mysql


PDO Driver for MySQL enabled
Client API version mysqlnd 5.0.12-dev - 20150407 - $Id: b396954eeb2d1d9ed7902b8bae237b287f21ad9e $
Directive Local Value Master Value
pdo_mysql.default_socket /var/lib/mysql/mysql.sock /var/lib/mysql/mysql.sock
pdo_sqlite


PDO Driver for SQLite 3.x enabled
SQLite Library 3.7.17
Phar


sqlite3


SQLite3 support enabled
SQLite3 module version 7.1.12
SQLite Library 3.7.17
Directive Local Value Master Value
sqlite3.extension_dir no value no value
standard

php.ini is:

 

[sqlite3]
;sqlite3.extension_dir =

 

[NotionCommotion]

What a difference a space makes!

$x=new PDO('sqlite:db.sqlite3');