Most Popular Categories

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

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Mismatched text domain. Expected 'most-popular-categories' but got 'popularcategories'.

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All output should be run through an escaping function (like esc_html_e() or esc_attr_e()), found '_e'.

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The $text parameter must be a single text string literal. Found: 0

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The $text text string should have translatable content. Found: ''

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Unescaped parameter $query used in $wpdb->get_results()\n$query assigned unsafely at line 133.

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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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Use placeholders and $wpdb->prepare(); found $query

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