has_image_size( string $name ): bool

User Contributed Notes

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   leemon 6 years ago

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   This function only checks for image sizes that are registered via the add_image_size() function, core image sizes, namely small, medium, medium_large and large, are not considered. Hence, checking for a core image size using has_image_size() will always return FALSE.
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   Codex 5 years ago

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   In a theme’s functions.php file combined with remove_image_size():

   add_action('after_setup_theme', 'remove_registered_image_size');
   
   function remove_registered_image_size() {
   	if ( has_image_size( 'image-name' ) ) {
   		remove_image_size( 'image-name' );
   	}
   }