如何能知道XML对象中有几个一层的元素 simplexml_load

如何能知道XML对象中有几个一层的元素 simplexml_load_file()

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Release： 2016-06-13 12:34:48

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怎么能知道XML对象中有几个一层的元素 simplexml_load_file()
比如：simplexml_load_file() 后用var_dump（）显示如下：
怎么能知道xml中包含几个page ？
下例中page是2个，一个[0]，一个[1].

<br />
object(SimpleXMLElement)#24 (1) <br />
{ <br />
	["page"]=> array(2) <br />
	{ <br />
		[0]=> object(SimpleXMLElement)#25 (2) <br />
		{ <br />
			["@attributes"]=> array(1) <br />
			{ <br />
				["id"]=> string(1) "0" <br />
			} <br />
			["background"]=> object(SimpleXMLElement)#38 (1) <br />
			{ <br />
				["@attributes"]=> array(1) <br />
				{ <br />
					["color"]=> string(11) "255,255,255" <br />
				} <br />
			} <br />
		} <br />
		[1]=> object(SimpleXMLElement)#26 (1) <br />
		{ <br />
			["@attributes"]=> array(1) <br />
			{ <br />
				["preview"]=> string(100) "" <br />
				<br />
			} <br />
		} <br />
	}<br />
}<br />
<br />

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