在下面的函数中，我试图将fopen/fwrite/fclose方法转换为首选的WP\\u文件系统方法。使用注释掉的脚本块，一切都能正常工作，但是，WP\\u文件系统方法总是返回错误块。

知道我做错了什么吗？

function so_doHtaccess(){
if ( !current_user_can( \'manage_options\' ) ) return;

    if ( file_exists( get_home_path() . ".htaccess" ) ) {
        $htaccess_file = get_home_path() . ".htaccess";
        $htaccessnew   = get_option(\'my_updated_htaccess\');

/*
        if ( is_writeable( $htaccess_file ) ) {
            $f = fopen( $htaccess_file, \'w+\' );
            fwrite( $f, $htaccessnew );
            fclose( $f );
        }
*/
            WP_Filesystem();
            global $wp_filesystem;

            $f = $wp_filesystem->get_contents($htaccess_file);

            if ( ! $wp_filesystem->put_contents( $f, $htaccessnew, 0644) ) {
                echo "There was an error saving the htaccess file. As a result no changes were made";die;
            }

    }

return;

}

当I var\\u dump（$wp\\u filesystem）时，它会产生：

object(WP_Filesystem_Direct)#358 (4) { 
["verbose"]=> bool(false) ["cache"]=> array(0) { } 
["method"]=> string(6) "direct" 
["errors"]=> object(WP_Error)#361 (2) { 
    ["errors"]=> array(0) { } 
    ["error_data"]=> array(0) { } 
} }

$f = $wp_filesystem->get_contents($htaccess_file);
var_dump($wp_filesystem);