You are looking at the HTML representation of the DBG format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the DBG format, set format=dbg.
See the complete documentation, or API help for more information.
array (
  'warnings' => 
  array (
    'dbgfm' => 
    array (
      '*' => 'format=dbgfm has been deprecated. Please use format=jsonfm instead.',
    ),
  ),
  'query' => 
  array (
    'namespaces' => 
    array (
      -2 => 
      array (
        'id' => -2,
        'case' => 'case-sensitive',
        '*' => '媒体文件',
        'canonical' => 'Media',
      ),
      -1 => 
      array (
        'id' => -1,
        'case' => 'first-letter',
        '*' => '特殊',
        'canonical' => 'Special',
      ),
      0 => 
      array (
        'id' => 0,
        'case' => 'case-sensitive',
        '*' => '',
        'subpages' => '',
        'content' => '',
        'nonincludable' => '',
      ),
      1 => 
      array (
        'id' => 1,
        'case' => 'case-sensitive',
        '*' => '讨论',
        'canonical' => 'Talk',
        'nonincludable' => '',
      ),
      2 => 
      array (
        'id' => 2,
        'case' => 'case-sensitive',
        '*' => '用户',
        'subpages' => '',
        'canonical' => 'User',
        'nonincludable' => '',
      ),
      3 => 
      array (
        'id' => 3,
        'case' => 'case-sensitive',
        '*' => '用户讨论',
        'canonical' => 'User talk',
        'nonincludable' => '',
      ),
      4 => 
      array (
        'id' => 4,
        'case' => 'case-sensitive',
        '*' => 'Blueidea',
        'subpages' => '',
        'canonical' => 'Project',
        'nonincludable' => '',
      ),
      5 => 
      array (
        'id' => 5,
        'case' => 'case-sensitive',
        '*' => 'Blueidea讨论',
        'canonical' => 'Project talk',
        'nonincludable' => '',
      ),
      6 => 
      array (
        'id' => 6,
        'case' => 'case-sensitive',
        '*' => '文件',
        'canonical' => 'File',
        'nonincludable' => '',
      ),
      7 => 
      array (
        'id' => 7,
        'case' => 'case-sensitive',
        '*' => '文件讨论',
        'canonical' => 'File talk',
        'nonincludable' => '',
      ),
      8 => 
      array (
        'id' => 8,
        'case' => 'first-letter',
        '*' => 'MediaWiki',
        'subpages' => '',
        'canonical' => 'MediaWiki',
        'nonincludable' => '',
      ),
      9 => 
      array (
        'id' => 9,
        'case' => 'first-letter',
        '*' => 'MediaWiki讨论',
        'canonical' => 'MediaWiki talk',
        'nonincludable' => '',
      ),
      10 => 
      array (
        'id' => 10,
        'case' => 'case-sensitive',
        '*' => '模板',
        'subpages' => '',
        'canonical' => 'Template',
      ),
      11 => 
      array (
        'id' => 11,
        'case' => 'case-sensitive',
        '*' => '模板讨论',
        'canonical' => 'Template talk',
        'nonincludable' => '',
      ),
      12 => 
      array (
        'id' => 12,
        'case' => 'case-sensitive',
        '*' => '帮助',
        'subpages' => '',
        'canonical' => 'Help',
        'nonincludable' => '',
      ),
      13 => 
      array (
        'id' => 13,
        'case' => 'case-sensitive',
        '*' => '帮助讨论',
        'canonical' => 'Help talk',
        'nonincludable' => '',
      ),
      14 => 
      array (
        'id' => 14,
        'case' => 'case-sensitive',
        '*' => '分类',
        'subpages' => '',
        'canonical' => 'Category',
        'nonincludable' => '',
      ),
      15 => 
      array (
        'id' => 15,
        'case' => 'case-sensitive',
        '*' => '分类讨论',
        'canonical' => 'Category talk',
        'nonincludable' => '',
      ),
      100 => 
      array (
        'id' => 100,
        'case' => 'case-sensitive',
        '*' => 'URL',
        'canonical' => 'URL',
        'nonincludable' => '',
      ),
      101 => 
      array (
        'id' => 101,
        'case' => 'case-sensitive',
        '*' => 'URL talk',
        'canonical' => 'URL talk',
        'nonincludable' => '',
      ),
    ),
  ),
)