eski hosting den yeni yere taşıdığım wordpress bu uyarıyı veriyor.. bu sorunu nasıl giderebilirim.. şimdiden teşekürler
Notice: add_custom_background is deprecated since version 3.4.0! Use add_theme_support( 'custom-background', $args ) instead. in /home/u6456302/public_html/wp-includes/functions.php on line 3880

function.php de 3880.satır aşağıda..

if ( WP_DEBUG && apply_filters( 'deprecated_function_trigger_error', true ) ) {
if ( function_exists( '__' ) ) {
if ( ! is_null( $replacement ) ) {
/* translators: 1: PHP function name, 2: version number, 3: alternative function name */
trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $function, $version, $replacement ) );
} else {
/* translators: 1: PHP function name, 2: version number */

/* 3880.satır */
trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
/* 3880.satır yukarida */

}
} else {
if ( ! is_null( $replacement ) ) {
trigger_error( sprintf( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.', $function, $version, $replacement ) );
} else {
trigger_error( sprintf( '%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.', $function, $version ) );
}
}
}
}