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PHP中simplexml_load_string函数使用说明_PHP

WBOY
Release: 2016-06-01 12:17:20
Original
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先用一段代码重现一下问题
乍一看,结果很让人费解:
复制代码 代码如下:
$string =
hello
world

EOF;

$data = simplexml_load_string($string);

print_r($data);
print_r($data->foo);
?>

乍一看,结果很让人费解:
复制代码 代码如下:
SimpleXMLElement Object
(
[foo] => Array
(
[0] => SimpleXMLElement Object
(
[bar] => hello
)
[1] => SimpleXMLElement Object
(
[bar] => world
)
)
)
SimpleXMLElement Object
(
[bar] => hello
)

明明print_r显示foo是一个有两个bar元素的数组,但是最后却仅仅显示了一个bar元素!
原因其实很简单,在如上所示simplexml_load_string的结果里,foo并不是数组,而是一个迭代对象!
可以这样确认:
复制代码 代码如下:
foreach ($data->foo as $v) print_r($v);
foreach ($data->children() as $v) print_r($v);

看来,print_r或者var_dump之类的表象并不完全可信,自己多留心吧。

Related labels:
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