php -n -c. -r '$m = new MongoDB\Driver\Manager("mongodb://127.0.0.1"); $m->executeQuery("foo.bar", new MongoDB\Driver\Query([]));'

Notice: MongoDB\Driver\Manager::executeQuery(): send of 4 bytes failed with errno=111 Connection refused in Command line code on line 1

Notice: MongoDB\Driver\Manager::executeQuery(): send of 4 bytes failed with errno=32 Broken pipe in Command line code on line 1

Notice: MongoDB\Driver\Manager::executeQuery(): send of 4 bytes failed with errno=32 Broken pipe in Command line code on line 1

Notice: MongoDB\Driver\Manager::executeQuery(): send of 4 bytes failed with errno=32 Broken pipe in Command line code on line 1

Notice: MongoDB\Driver\Manager::executeQuery(): send of 4 bytes failed with errno=32 Broken pipe in Command line code on line 1

Notice: MongoDB\Driver\Manager::executeQuery(): send of 11 bytes failed with errno=32 Broken pipe in Command line code on line 1

Notice: MongoDB\Driver\Manager::executeQuery(): send of 4 bytes failed with errno=32 Broken pipe in Command line code on line 1

Notice: MongoDB\Driver\Manager::executeQuery(): send of 4 bytes failed with errno=32 Broken pipe in Command line code on line 1

Notice: MongoDB\Driver\Manager::executeQuery(): send of 19 bytes failed with errno=32 Broken pipe in Command line code on line 1
^C
php -n -c. -r   7.12s user 0.48s system 100% cpu 7.594 total