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Source View: postmeta_form_limit

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Line Code
664
665      /**
666       * Filter the number of custom fields to retrieve for the drop-down
667       * in the Custom Fields meta box.
668       *
669       * @since 2.1.0
670       *
671       * @param int $limit Number of custom fields to retrieve. Default 30.
672       */
673      $limit = apply_filters( 'postmeta_form_limit', 30 );
674      $sql = "SELECT meta_key
675           FROM $wpdb->postmeta
676           GROUP BY meta_key
677           HAVING meta_key NOT LIKE %s
678           ORDER BY meta_key
679           LIMIT %d";
680      $keys = $wpdb->get_col( $wpdb->prepare( $sql, $wpdb->esc_like( '_' ) . '%', $limit ) );
681      if ( $keys ) {
682           natcasesort( $keys );