Admin filter posts by year

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

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Processing form data without nonce verification.

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Detected usage of a non-sanitized input variable: $_GET['m']

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$_GET['m'] not unslashed before sanitization. Use wp_unslash() or similar

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PHP file should prevent direct access. Add a check like: if ( ! defined( 'ABSPATH' ) ) exit;

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

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print_r() found. Debug code should not normally be used in production.

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var_dump() found. Debug code should not normally be used in production.

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All output should be run through an escaping function (see the Security sections in the WordPress Developer Handbooks), found '$m2'.

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Tested up to: 6.7 < 7.0. The "Tested up to" value in your plugin is not set to the current version of WordPress. This means your plugin will not show up in searches, as we require plugins to be compatible and documented as tested up to the most recent version of WordPress.