Add post thumbnail to wp-admin list view

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Processing form data without nonce verification.

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

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Plugin name "Add post thumbnail to wp-admin list view" is different from the name declared in plugin header "Post thumbnail in Post admin list".

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

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Tested up to: 6.9 < 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.

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

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The "Domain Path" header in the plugin file must point to an existing folder. Found: "languages"

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The plugin name includes a restricted term. Your chosen plugin name - "Add post thumbnail to wp-admin list view" - contains the restricted term "wp" which cannot be used at all in your plugin name.

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Incorrect Stable Tag. It's recommended not to use "Stable Tag: trunk". Your Stable Tag is meant to be the stable version of your plugin and it needs to be exactly the same with the Version in your main plugin file's header. Any mismatch can prevent users from downloading the correct plugin files from WordPress.org.