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Parameter $table_name

Expected type: String
Description: The name of the table containing the column we want to change

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Parameter $old_column

Expected type: String
Description: The name of the column we want to change

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Parameter $column_info

Expected type: Array
Description: Information about the changes we want to make to the column (at least one of these must be set)

Array Elements of $column_info
Key	Optional	Expected type	Description
auto	yes	Boolean	True to make the column auto-incrementing, false to remove the auto increment
default	yes	Mixed	The default value for the column
name	yes	String	The new name for the column
null	yes	Boolean	Whether or not to allow null values (set to false to change a column to NOT NULL)
size	yes	Integer	Size of the column
type	yes	Enumerated String	Datatype for the column (see smf_db_add_column for possible values)

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Parameter $parameters

Expected type: Array
Description: An array of parameters

Array Elements of $parameters
Key	Optional	Expected type	Description
no_prefix	yes	Boolean	If true, SMF won't add the db_prefix to the table name

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Parameter $error

Expected type: Enumerated String
Description: Error parameter (currently unused?)

Possible string values
Allowed values	Description
'fatal'	Default value

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Return value

Expected type: Boolean
Description: True if the changes were successful, false if the column doesn't exist