php7 warnings in plugin

ILE: …/wordpress-popular-posts/wordpress-popular-posts.php
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FOUND 0 ERRORS AND 24 WARNINGS AFFECTING 24 LINES
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895 | WARNING | Method name “WordPressPopularPosts::__activate” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
951 | WARNING | Method name “WordPressPopularPosts::__deactivate” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
983 | WARNING | Method name “WordPressPopularPosts::__upgrade” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
1048 | WARNING | Method name “WordPressPopularPosts::__do_db_tables” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
1095 | WARNING | Method name “WordPressPopularPosts::__check_requirements” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
1404 | WARNING | Method name “WordPressPopularPosts::__flush_transients” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
1425 | WARNING | Method name “WordPressPopularPosts::__update_views” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
1783 | WARNING | Method name “WordPressPopularPosts::__get_popular_posts” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
1901 | WARNING | Method name “WordPressPopularPosts::__render_popular_post” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
1982 | WARNING | Method name “WordPressPopularPosts::__cache” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
2461 | WARNING | Method name “WordPressPopularPosts::__get_img” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
2523 | WARNING | Method name “WordPressPopularPosts::__image_resize” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
2555 | WARNING | Method name “WordPressPopularPosts::__get_image_file_paths” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
2666 | WARNING | Method name “WordPressPopularPosts::__get_attachment_id” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
2702 | WARNING | Method name “WordPressPopularPosts::__fetch_external_image” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
2993 | WARNING | Method name “WordPressPopularPosts::__format_content” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
3114 | WARNING | Method name “WordPressPopularPosts::__get_image_sizes” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
3186 | WARNING | Method name “WordPressPopularPosts::__is_numeric” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
3196 | WARNING | Method name “WordPressPopularPosts::__curdate” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
3206 | WARNING | Method name “WordPressPopularPosts::__now” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
3216 | WARNING | Method name “WordPressPopularPosts::__microtime_float” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
3234 | WARNING | Method name “WordPressPopularPosts::__merge_array_r” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
3257 | WARNING | Method name “WordPressPopularPosts::__is_bot” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
3281 | WARNING | Method name “WordPressPopularPosts::__debug” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
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