Documentation & API reference
Functions
Primary tabs
| Name | Location | Description | Direct uses |
Strings |
|---|---|---|---|---|
| drupal_placeholder |
drupal/ |
Formats text for emphasized display in a placeholder inside a sentence. | 5 | |
| drupal_register_shutdown_function |
drupal/ |
Registers a function for execution on shutdown. | 12 | |
| drupal_check_memory_limit |
drupal/ |
Compares the memory required for an operation to the available memory. | 3 | |
| drupal_get_schema |
drupal/ |
Gets the schema definition of a table, or the whole database schema. | 25 | |
| drupal_get_complete_schema |
drupal/ |
Gets the whole database schema. | 2 | |
| drupal_get_schema_versions |
drupal/ |
Returns an array of available schema versions for a module. | 5 | |
| drupal_get_installed_schema_version |
drupal/ |
Returns the currently installed schema version for a module. | 14 | |
| drupal_set_installed_schema_version |
drupal/ |
Updates the installed version information for a module. | 5 | |
| drupal_install_schema |
drupal/ |
Creates all tables defined in a module's hook_schema(). | 3 | |
| drupal_uninstall_schema |
drupal/ |
Removes all tables defined in a module's hook_schema(). | 2 | |
| drupal_get_schema_unprocessed |
drupal/ |
Returns the unprocessed and unaltered version of a module's schema. | 14 | |
| _drupal_schema_initialize |
drupal/ |
Fills in required default values for table definitions from hook_schema(). | 3 | |
| drupal_schema_fields_sql |
drupal/ |
Retrieves a list of fields from a table schema. | 1 | |
| drupal_write_record |
drupal/ |
Saves (inserts or updates) a record to the database based upon the schema. | 25 | |
| db_query_temporary |
drupal/ |
Executes a query string and saves the result set to a temporary table. | 2 | |
| db_insert |
drupal/ |
Returns a new InsertQuery object for the active database. | 4 | |
| db_merge |
drupal/ |
Returns a new MergeQuery object for the active database. | ||
| db_update |
drupal/ |
Returns a new UpdateQuery object for the active database. | 1 | |
| db_delete |
drupal/ |
Returns a new DeleteQuery object for the active database. | 2 | |
| db_truncate |
drupal/ |
Returns a new TruncateQuery object for the active database. | 1 | |
| db_select |
drupal/ |
Returns a new SelectQuery object for the active database. | 121 | |
| db_transaction |
drupal/ |
Returns a new transaction object for the active database. | 11 | |
| db_set_active |
drupal/ |
Sets a new active database. | 5 | |
| db_escape_table |
drupal/ |
Restricts a dynamic table name to safe characters. | ||
| db_escape_field |
drupal/ |
Restricts a dynamic column or constraint name to safe characters. | ||
| db_like |
drupal/ |
Escapes characters that work as wildcard characters in a LIKE pattern. | 15 | |
| db_driver |
drupal/ |
Retrieves the name of the currently active database driver. | ||
| db_close |
drupal/ |
Closes the active database connection. | 1 | |
| db_next_id |
drupal/ |
Retrieves a unique id. | 4 | |
| db_or |
drupal/ |
Returns a new DatabaseCondition, set to "OR" all conditions together. | 17 | |
| db_and |
drupal/ |
Returns a new DatabaseCondition, set to "AND" all conditions together. | 6 | |
| db_xor |
drupal/ |
Returns a new DatabaseCondition, set to "XOR" all conditions together. | ||
| db_condition |
drupal/ |
Returns a new DatabaseCondition, set to the specified conjunction. | ||
| db_create_table |
drupal/ |
Creates a new table from a Drupal table definition. | 24 | |
| db_field_names |
drupal/ |
Returns an array of field names from an array of key/index column specifiers. | ||
| db_index_exists |
drupal/ |
Checks if an index exists in the given table. | 2 | |
| db_table_exists |
drupal/ |
Checks if a table exists. | 18 | |
| db_field_exists |
drupal/ |
Checks if a column exists in the given table. | 10 | |
| db_find_tables |
drupal/ |
Finds all tables that are like the specified base table name. | 3 | |
| _db_create_keys_sql |
drupal/ |
|||
| db_rename_table |
drupal/ |
Renames a table. | 4 | |
| db_drop_table |
drupal/ |
Drops a table. | 18 | |
| db_add_field |
drupal/ |
Adds a new field to a table. | 12 | |
| db_drop_field |
drupal/ |
Drops a field. | 9 | |
| db_field_set_default |
drupal/ |
Sets the default value for a field. | 1 | |
| db_field_set_no_default |
drupal/ |
Sets a field to have no default value. | 1 | |
| db_add_primary_key |
drupal/ |
Adds a primary key to a database table. | 2 | |
| db_drop_primary_key |
drupal/ |
Drops the primary key of a database table. | 6 | |
| db_add_unique_key |
drupal/ |
Adds a unique key. | ||
| db_drop_unique_key |
drupal/ |
Drops a unique key. | 1 |