db_escape_field
function db_escape_field
db_escape_field($field)
Restricts a dynamic column or constraint name to safe characters.
Only keeps alphanumeric and underscores.
Parameters
string $field: The field name to escape.
Return value
string The escaped field name as a string.
Deprecated
as of Drupal 8.0.x, will be removed in Drupal 9.0.0. Instead, get a database connection injected into your service from the container and call escapeTable() on it. For example, $injected_database->escapeTable($table);