Ticket #36978: 36978.patch

src/wp-includes/taxonomy.php

@@ -927 +927 @@
                 return false;
         }
 
+        /**
+         * Get all Term data from database by Term field and data.
+         *
+         * This allows one to short-circuit the default logic, perhaps by
+         * replacing it with a routine that is more optimal for your setup.
+         *
+         * @since 4.6.0
+         *
+         * @param string     $field    Either 'slug', 'name', 'id' (term_id), or 'term_taxonomy_id'
+         * @param string|int $value    Search for this term value
+         * @param string     $taxonomy Taxonomy name. Optional, if `$field` is 'term_taxonomy_id'.
+         * @param string     $output   Constant OBJECT, ARRAY_A, or ARRAY_N
+         * @param string     $filter   Optional, default is raw or no WordPress defined filter will applied.
+         */
+        $pre = apply_filters( 'pre_get_term_by', null, $field, $value, $taxonomy, $output, $filter );
+        if ( null !== $pre ) {
+                return $pre;
+        }
+
         $tax_clause = $wpdb->prepare( "AND tt.taxonomy = %s", $taxonomy );
 
         if ( 'slug' == $field ) {