FSM Custom Featured Image Caption

Missing $domain parameter in function call to esc_attr__().

load_plugin_textdomain() has been discouraged since WordPress version 4.6. When your plugin is hosted on WordPress.org, you no longer need to manually include this function call for translations under your plugin slug. WordPress will automatically load the translations for you as needed.

Hook names invoked by a theme/plugin should start with the theme/plugin prefix. Found: "post_thumbnail_size".

Missing "License" in Plugin Header. Please update your Plugin Header with a valid GPLv2 (or later) compatible license.

The $text parameter must be a single text string literal. Found: $args['class']

Missing $domain parameter in function call to esc_attr__().

The $text parameter must be a single text string literal. Found: $cstyle

Global variables defined by a theme/plugin should start with the theme/plugin prefix. Found: "$FSMCustomFeaturedImageCaption".

Global variables defined by a theme/plugin should start with the theme/plugin prefix. Found: "$fsm_custom_featured_image_caption_options".

Functions declared in the global namespace by a theme/plugin should start with the theme/plugin prefix. Found: "print_thumbnail".