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wp-admin/install-helper.php ›

Functions4
Plugins may load this file to gain access to special helper functions for plugin installation. This file is not included by WordPress and it is recommended, to prevent fatal errors, that this file is included using require_once().


Function Short description
check_columnCheck column matches criteria.
maybe_add_columnAdd column to database table, if column doesn't already exist in table.
maybe_create_tableCreate database table, if it doesn't already exist.
maybe_drop_columnDrop column from database table, if it exists.