Add a message about your WordPress theme's content width to the Media Settings admin page.
<?php
// Add to theme functions.php file
function ccd_content_width() {
// Set content width
if ( ! isset( $content_width ) ) {
$content_width = 1280;
}
// Content width message
global $pagenow;
if ( 'options-media.php' == $pagenow ) {
$class = 'notice notice-info';
$theme = wp_get_theme();
$url = admin_url( 'themes.php' );
$message = __( 'The content width of the <a href="', 'my-theme' ) . $url . '">' . $theme->get( 'Name' ) . __( '</a> theme is ', 'my-theme' ) . $content_width . __( ' pixels.', 'my-theme' );
printf( '<div class="%1$s"><p>%2$s</p></div>', $class, $message );
}
}
add_action( 'admin_notices', 'ccd_content_width' );
?>
WordPress Snippet