CI_Migration
===============

Migration Class

All migrations should implement this, forces up() and down() and gives
access to the CI super-global.


* Class name: CI_Migration
* Namespace: 





Properties
----------


### $_migration_enabled

    protected boolean $_migration_enabled = FALSE

Whether the library is enabled



* Visibility: **protected**


### $_migration_type

    protected boolean $_migration_type = 'sequential'

Migration numbering type



* Visibility: **protected**


### $_migration_path

    protected string $_migration_path = NULL

Path to migration classes



* Visibility: **protected**


### $_migration_version

    protected mixed $_migration_version

Current migration version



* Visibility: **protected**


### $_migration_table

    protected string $_migration_table = 'migrations'

Database table with migration info



* Visibility: **protected**


### $_migration_auto_latest

    protected boolean $_migration_auto_latest = FALSE

Whether to automatically run migrations



* Visibility: **protected**


### $_migration_regex

    protected boolean $_migration_regex = NULL

Migration basename regex



* Visibility: **protected**


### $_error_string

    protected string $_error_string = ''

Error message



* Visibility: **protected**


Methods
-------


### __construct

    void CI_Migration::__construct(array $config)

Initialize Migration Class



* Visibility: **public**


#### Arguments
* $config **array**



### version

    mixed CI_Migration::version(string $target_version)

Migrate to a schema version

Calls each migration step required to get to the schema version of
choice

* Visibility: **public**


#### Arguments
* $target_version **string** - <p>Target schema version</p>



### latest

    mixed CI_Migration::latest()

Sets the schema to the latest migration



* Visibility: **public**




### current

    mixed CI_Migration::current()

Sets the schema to the migration version set in config



* Visibility: **public**




### error_string

    string CI_Migration::error_string()

Error string



* Visibility: **public**




### find_migrations

    array CI_Migration::find_migrations()

Retrieves list of available migration scripts



* Visibility: **public**




### _get_migration_number

    string CI_Migration::_get_migration_number(string $migration)

Extracts the migration number from a filename



* Visibility: **protected**


#### Arguments
* $migration **string**



### _get_migration_name

    string CI_Migration::_get_migration_name(string $migration)

Extracts the migration class name from a filename



* Visibility: **protected**


#### Arguments
* $migration **string**



### _get_version

    string CI_Migration::_get_version()

Retrieves current schema version



* Visibility: **protected**




### _update_version

    void CI_Migration::_update_version(string $migration)

Stores the current schema version



* Visibility: **protected**


#### Arguments
* $migration **string** - <p>Migration reached</p>



### __get

    mixed CI_Migration::__get(string $var)

Enable the use of CI super-global



* Visibility: **public**


#### Arguments
* $var **string**