PHP订单SimpleXMLElement

Question

我有一个SimpleXMLElement对象：

 SimpleXMLElement Object ( 
    [@attributes] => Array ( 
        [id] => 1234 
        [color] => red 
    ) 
    [one] => SimpleXMLElement Object ( 
        [@attributes] => Array ( 
            [position] => 2 
            [close] => false 
        ) 
    ) 
    [two] => SimpleXMLElement Object ( 
        [@attributes] => Array ( 
            [position] => 0 
            [close] => false 
        ) 
    ) 
    [three] => SimpleXMLElement Object ( 
        [@attributes] => Array ( 
            [position] => 0 
            [close] => true 
        ) 
    )
)

现在我想通过属性＆＃34; position＆＃34;对Childs（＆＃34; one＆＃34;，＆＃34; two＆＃34;＆＃34; three＆＃34;）进行排序。 我该如何解决这个问题？

谢谢！

Answer 1

使用此功能：

function sortByKeyValue($the_array, $key)
{
   $cmp_val="((\$a['$key']>\$b['$key']) ? 1 : ((\$a['$key']==\$b['$key']) 0:-1))";
   $cmp=create_function('$a, $b', "return $cmp_val;");
   uasort($the_array, $cmp);

   return $the_array;
}

要使用它，请执行以下操作：

sortByKeyValue(SimpleXMLElementObject, 'position')