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<?php // Takes care of creating, updating and deleting database tables class scbTable { protected $name; protected $columns; protected $upgrade_method; function __construct( $name, $file, $columns, $upgrade_method = 'dbDelta' ) { $this->name = $name; $this->columns = $columns; $this->upgrade_method = $upgrade_method; scb_register_table( $name ); if ( $file ) { scbUtil::add_activation_hook( $file, array( $this, 'install' ) ); scbUtil::add_uninstall_hook( $file, array( $this, 'uninstall' ) ); } } function install() { scb_install_table( $this->name, $this->columns, $this->upgrade_method ); } function uninstall() { scb_uninstall_table( $this->name ); } } /** * Register a table with $wpdb * * @param string $key The key to be used on the $wpdb object * @param string $name The actual name of the table, without $wpdb->prefix */ function scb_register_table( $key, $name = false ) { global $wpdb; if ( !$name ) $name = $key; $wpdb->tables[] = $name; $wpdb->$key = $wpdb->prefix . $name; } /** * Runs the SQL query for installing/upgrading a table * * @param string $key The key used in scb_register_table() * @param string $columns The SQL columns for the CREATE TABLE statement * @param array $opts Various other options */ function scb_install_table( $key, $columns, $opts = array() ) { global $wpdb; $full_table_name = $wpdb->$key; if ( is_string( $opts ) ) { $opts = array( 'upgrade_method' => $opts ); } $opts = wp_parse_args( $opts, array( 'upgrade_method' => 'dbDelta', 'table_options' => '', ) ); $charset_collate = ''; if ( $wpdb->has_cap( 'collation' ) ) { if ( ! empty( $wpdb->charset ) ) $charset_collate = "DEFAULT CHARACTER SET $wpdb->charset"; if ( ! empty( $wpdb->collate ) ) $charset_collate .= " COLLATE $wpdb->collate"; } $table_options = $charset_collate . ' ' . $opts['table_options']; if ( 'dbDelta' == $opts['upgrade_method'] ) { require_once ABSPATH . 'wp-admin/includes/upgrade.php'; dbDelta( "CREATE TABLE $full_table_name ( $columns ) $table_options" ); return; } if ( 'delete_first' == $opts['upgrade_method'] ) $wpdb->query( "DROP TABLE IF EXISTS $full_table_name;" ); $wpdb->query( "CREATE TABLE IF NOT EXISTS $full_table_name ( $columns ) $table_options;" ); } function scb_uninstall_table( $key ) { global $wpdb; $wpdb->query( "DROP TABLE IF EXISTS " . $wpdb->$key ); }
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