function db_field_names in Drupal 8

Same name and namespace in other branches

1. 6 includes/database.inc \db_field_names()
2. 7 includes/database/database.inc \db_field_names()

Returns an array of field names from an array of key/index column specifiers.

This is usually an identity function but if a key/index uses a column prefix specification, this function extracts just the name.

Parameters

array $fields: An array of key/index column specifiers.

Return value

array An array of field names.

See also

https://www.drupal.org/node/2993033

\Drupal\Core\Database\Schema::fieldNames()

Related topics

1 call to db_field_names()

DatabaseLegacyTest::testDbFieldNames in core/tests/Drupal/KernelTests/Core/Database/DatabaseLegacyTest.php

Tests deprecation of the db_field_names() function.

File

core/includes/database.inc, line 652

Core systems for the database layer.

Code

function db_field_names($fields) {
  @trigger_error('db_field_names() is deprecated in drupal:8.0.0. It will be removed from drupal:9.0.0. Instead, get a database connection injected into your service from the container, get its schema driver, and call fieldNames() on it. For example, $injected_database->schema()->fieldNames($fields). See https://www.drupal.org/node/2993033', E_USER_DEPRECATED);
  return Database::getConnection()
    ->schema()
    ->fieldNames($fields);
}