Cloud Datastore Client - Class GqlQuery (1.18.1)

 use Google\Cloud\Datastore\DatastoreClient;

$datastore = new DatastoreClient();

$query = $datastore->gqlQuery('SELECT * FROM Companies');
$res = $datastore->runQuery($query);

foreach ($res as $company) {
    echo $company['companyName'] . PHP_EOL;
} 

 // Literals must be provided as bound parameters by default:
$query = $datastore->gqlQuery('SELECT * FROM Companies WHERE companyName = @companyName', [
    'bindings' => [
        'companyName' => 'Google'
    ]
]); 

 // Positional binding is also supported:
$query = $datastore->gqlQuery('SELECT * FROM Companies WHERE companyName = @1 LIMIT 1', [
    'bindings' => [
        'Google'
    ]
]); 

 // While not recommended, you can use literals in your query string:
$query = $datastore->gqlQuery('SELECT * FROM Companies WHERE companyName = \'Google\'', [
    'allowLiterals' => true
]); 

 // Using cursors as query bindings:
$cursor = $datastore->cursor($cursorValue);

$query = $datastore->gqlQuery('SELECT * FROM Companies OFFSET @offset', [
    'bindings' => [
        'offset' => $cursor
    ]
]);