I received following error in apache error log, could you kindly advise how to proceed?

PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/mongodb.so' - /usr/lib64/php/modules/mongodb.so: undefined symbol: file_globals in Unknown on line 0

I installed the Mongodb.so and necessary php libraries, it's working file on command line using following test code, but visit the same file on browser keep giving error(running on Apache 2.4+php 5.6), could you give me a hint?

Fatal error: Class 'MongoDB\Driver\Manager' not found in ./vendor/mongodb/mongodb/src/Client.php on line 56

the test code as following:

<?php
$filename='./vendor/autoload.php';
require $filename;
$client = new MongoDB\Client("mongodb://localhost:27017");
$collection = $client->demo->beers;
$result = $collection->insertOne( ['name' => 'Hinterland', 'brewery' => 'BrewDog'] );
echo "Inserted with Object ID '{$result->getInsertedId()}'";
?>

Reporter: michael
E-mail: vanmichael@gmail.com