dongtong0796 2014-08-22 14:14
浏览 38

如何使用xpath php获取唯一值?

This is my xml. i need to find unique values from the products with there code

<products>
    <product>
        <token><code>1</code></token>
        <productName>Product 1</productName>
    </product>
    <product>
        <token><code>2</code></token>
        <productName>Product 2</productName>
    </product>
    <product>
        <token><code>1</code></token>
        <productName>Product 2</productName>
    </product>
    <product>
        <token><code>3</code></token>
        <productName>Product 2</productName>
    </product>
</products>

I try like below i load this in to $xd_item

foreach ( $xd_item->xpath('/product/token[not(code=preceding-sibling::token/code)]/token') as $n )
{ 
echo $n;
}

I need out put like below

 product code : 1
    product Name : Product 1

    product code : 2
    product Name : Product 2

    product code : 3
    product Name : Product 3
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1条回答 默认 最新

  • duancha1065 2014-08-22 15:10
    关注

    You need to check for both following sibling and preceding sibling to be sure that the <product> has no duplicate :

    /products/product[
                   not(token/code=preceding-sibling::token/code) 
                        and 
                   not(token/code=following-sibling::token/code)
                     ]
    

    Then you would be able to loop through <product> nodes selected by above XPath, and print any desired part of the product, for example :

    foreach ($xd_item->xpath(....) as $n)
    { 
        echo $n->token->code;
        echo $n->productName;
    }
    
    评论

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