Display Post Types – Post Grid, post list and post sliders

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

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

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Processing form data without nonce verification.

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Detected usage of a non-sanitized input variable: $_POST['data']

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Detected usage of tax_query, possible slow query.

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Use of a direct database call is discouraged.

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Direct database call without caching detected. Consider using wp_cache_get() / wp_cache_set() or wp_cache_delete().

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Detected usage of meta_query, possible slow query.

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Using exclusionary parameters, like post__not_in, in calls to get_posts() should be done with caution, see https://wpvip.com/documentation/performance-improvements-by-removing-usage-of-post__not_in/ for more information.

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Plugin name "Display Post Types - Post Grid, post list and post sliders" is different from the name declared in plugin header "Display Post Types".