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Source View: postmeta_form_limit

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