如何去掉织梦网站底部的powered by dedecms方法

织梦DedeCMS 5.7 最近的补丁更新后，网站底部出现了织梦的版权信息“powered by dedecms”，
因为这段代码不在模板里面，所以很多人不知道怎么去掉，下面就告诉你删除powered by dedecms的方法。

在include/dedesql.class.php文件中找到第588行：

$arrs1 = array(0x63,0x66,0x67,0x5f,0x70,0x6f,0x77,0x65,0x72,0x62,0x79);
$arrs2 = array(0x20,0x3c,0x61,0x20,0x68,0x72,0x65,0x66,0x3d,0x68,0x74,0x74,0x70,0x3a,0x2f,0x2f, 0x77,0x77,0x77,0x2e,0x64,0x65,0x64,0x65,0x63,0x6d,0x73,0x2e,0x63,0x6f,0x6d,0x20,0x74,0x61,0x72, 0x67,0x65,0x74,0x3d,0x27,0x5f,0x62,0x6c,0x61,0x6e,0x6b,0x27,0x3e,0x50,0x6f,0x77,0x65,0x72,0x20, 0x62,0x79,0x20,0x44,0x65,0x64,0x65,0x43,0x6d,0x73,0x3c,0x2f,0x61,0x3e);

改成： $arrs1 = array(); $arrs2 = array(); 这样网站底部的织梦的版权信息“powered by dedecms”就删除了。