第一步

wp-includes/class-wp.php 165 行：

$pathinfo = isset( $_SERVER['PATH_INFO'] ) ? $_SERVER['PATH_INFO'] : '';

修改为：

$pathinfo = isset( $_SERVER['PATH_INFO'] ) ? mb_convert_encoding($_SERVER['PATH_INFO'],'utf-8', 'GBK') : '';

第二步

wp-includes/class-wp.php 170 行：

 list( $req_uri ) = explode( '?', $_SERVER['REQUEST_URI'] );

修改为：

list( $req_uri ) = explode( '?', mb_convert_encoding($_SERVER['REQUEST_URI'], 'utf-8','GBK') );