XML 复杂解析 [英] XML complex Parsing

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问题描述

可能的重复:
在 Xpath 中不同吗?

我正在尝试使用 PHP 从我的 XML 文件中提取数据.我想从我的 XML 文件中获取基于 WebCategory 的唯一 ProductRange.但是下面编写的 PHP 代码会生成重复/重复的结果.我不知道我哪里出错了！这是代码:

I am trying to extract data from my XML file using PHP. I want to get unique ProductRange based on WebCategory from my XML file. But the PHP code written below generate duplicate/repetitive results. I don't know where I am making mistake! Here is the code :

XML 代码:

<?xml version="1.0" standalone="yes"?>
<Rows> 
<Row Code="10000" Name="HTC Wildfire S-A510E " ProductRange="HTC" ProductSubRange="Wildfire" WebCategory="Mobiles" WebDescription="Available in black and white.lightweight." Productlength="46mm" ProductWidth="16mm" ProductHeight="21.000" Weight="400gm" Description="Pck: 12   Plt: 1152" />
<Row Code="10001" Name="HTC Wildfire" ProductRange="HTC" ProductSubRange="Wildfire" WebCategory="Mobiles" WebDescription="Available in black and white.lightweight." Productlength="46mm" ProductWidth="16mm" ProductHeight="21.000" Weight="400gm" Description="Pck: 12   Plt: 1152" />
<Row Code="10002" Name="Samsung Galaxy S3" ProductRange="Samsung" ProductSubRange="Galaxy" WebCategory="Mobiles" WebDescription="Available in black and white.lightweight." Productlength="46mm" ProductWidth="16mm" ProductHeight="21.000" Weight="400gm" Description="Pck: 12   Plt: 1152" />
<Row Code="10003" Name="Samsung Galaxy S2" ProductRange="Samsung" ProductSubRange="Galaxy" WebCategory="Mobiles" WebDescription="Available in black and white.lightweight." Productlength="46mm" ProductWidth="16mm" ProductHeight="21.000" Weight="400gm" Description="Pck: 12   Plt: 1152" />
<Row Code="10004" Name="Samsung Galaxy S1" ProductRange="Samsung" ProductSubRange="Galaxy" WebCategory="Mobiles" WebDescription="Available in black and white.lightweight." Productlength="46mm" ProductWidth="16mm" ProductHeight="21.000" Weight="400gm" Description="Pck: 12   Plt: 1152" />
<Row Code="10005" Name="Samsung Galaxy Tabloid" ProductRange="Samsung" ProductSubRange="Galaxy Tabloids" WebCategory="Gadgets" WebDescription="Available in black and white.lightweight." Productlength="46mm" ProductWidth="16mm" ProductHeight="21.000" Weight="400gm" Description="Pck: 12   Plt: 1152" />
<Row Code="10006" Name="Apple Ipad 3" ProductRange="Apple" ProductSubRange="Tabloids" WebCategory="Gadgets" WebDescription="Available in black and white.lightweight." Productlength="46mm" ProductWidth="16mm" ProductHeight="21.000" Weight="400gm" Description="Pck: 12   Plt: 1152" />
<Row Code="10007" Name="Apple Iphone 4S" ProductRange="Apple" ProductSubRange="Iphone" WebCategory="Mobiles" WebDescription="Available in black and white.lightweight." Productlength="46mm" ProductWidth="16mm" ProductHeight="21.000" Weight="400gm" Description="Pck: 12   Plt: 1152" />
<Row Code="10008" Name="Apple Iphone 3G" ProductRange="Apple" ProductSubRange="Iphone" WebCategory="Mobiles" WebDescription="Available in black and white.lightweight." Productlength="46mm" ProductWidth="16mm" ProductHeight="21.000" Weight="400gm" Description="Pck: 12   Plt: 1152" />
<Row Code="10009" Name="Miscrosoft XBOX 360 Elite" ProductRange="Microsoft" ProductSubRange="XBOX" WebCategory="Consoles" WebDescription="Available in black and white.lightweight." Productlength="46mm" ProductWidth="16mm" ProductHeight="21.000" Weight="400gm" Description="Pck: 12   Plt: 1152" />
<Row Code="10010" Name="Sony Playstation 4" ProductRange="Sony" ProductSubRange="Playstation" WebCategory="Consoles" WebDescription="Available in black and white.lightweight." Productlength="46mm" ProductWidth="16mm" ProductHeight="21.000" Weight="400gm" Description="Pck: 12   Plt: 1152" />
<Row Code="10011" Name="Sony PSP Go" ProductRange="Microsoft" ProductSubRange="PSP" WebCategory="Consoles" WebDescription="Available in black and white.lightweight." Productlength="46mm" ProductWidth="16mm" ProductHeight="21.000" Weight="400gm" Description="Pck: 12   Plt: 1152" />
<Row Code="10012" Name="Sony Erricsson Satio" ProductRange="Sony Ericsson" ProductSubRange="Satio Series" WebCategory="Mobiles" WebDescription="Available in black and white.lightweight." Productlength="46mm" ProductWidth="16mm" ProductHeight="21.000" Weight="400gm" Description="Pck: 12   Plt: 1152" />
<Row Code="10013" Name="TomTom Go Live Gl2" ProductRange="TomTom" ProductSubRange="Go Live" WebCategory="Navigation" WebDescription="Available in black and white.lightweight." Productlength="46mm" ProductWidth="16mm" ProductHeight="21.000" Weight="400gm" Description="Pck: 12   Plt: 1152" />
</Rows>

我想从我的 XML 文件中获取基于 WebCategory 的唯一 ProductRange.但是下面编写的 PHP 代码会生成重复/重复的结果.我不知道我哪里出错了！

I want to get unique ProductRange based on WebCategory from my XML file. But the PHP code written below generate duplicate/repetitive results. I don't know where I am making mistake!

PHP 代码:

  <?
 $xml =  simplexml_load_string(file_get_contents('XML/products.xml'));
 $prifix = '/categories/listings/' ;
 $cat=array();
 foreach ($xml as $row) {
 $attr = $row->attributes();
 if (!in_array((string)$attr->WebCategory, $cat)){
  printf('<li>%s</li>', anchor($prifix . $attr->Code, $attr->ProductRange));
  $cat[] = (string)$attr->WebCategory;
 }
 }
 ?>

请注意:我想根据给定的 WebCategory 提取 ProductRange 例如我想根据他们的 Webcategory 显示所有 ProductRange，就像这样选择 SQL 查询:

PLEASE NOTE: I want to extract ProductRange based on given WebCategory e.g I want to show all ProductRange according to their Webcategory like this select SQL query:

     "select ProductRange from XML where WebCategory='Mobiles'"

它可以给我基于 XML 的独特ProductRange"(非重复结果)，如下所示:

and it could give me distinct "ProductRange"(Not repetitive results) based on XML like this:

HTC
三星
手机

Htc
Samsung
Iphone

等等...我尽我所能，但未能使用上述编码方法生成独特的ProductRange".

and so... I tried my best but failed to generate unique "ProductRange" based using the coding approach mentioned above.

请纠正我的错误，并指导我在哪里需要进行更改以获得如上所述的唯一 ProductRange.

Please correct me where i am wrong and kindly guide me where I need to make change to get unique ProductRange as mentioned above.

推荐答案

你可以试试

$list = groupBy($xml, "WebCategory");
foreach ( $list['Mobiles'] as $product ) {
    printf('<li>%s %s</li>', $product->Code, $product->Name);
}

输出

  • 10000 HTC Wildfire S-A510E
  • 10001 HTC Wildfire
  • 10002 三星 Galaxy S3
  • 10003 三星 Galaxy S2
  • 10004 三星 Galaxy S1
  • 10007 Apple Iphone 4S
  • 10008 Apple Iphone 3G
  • 10012 Sony Erricsson Satio

    • 使用的函数

    function groupBy($xml, $categoryName) {
    $xml = new \SimpleXMLElement($xml);
    $category = array();
    foreach ( $xml as $row ) {
        $attr = $row->attributes();

        if (! isset($attr->$categoryName)) {
            trigger_error("$categoryName does not exist in XML");
            break;
        }

        $category[(string) $attr->$categoryName][] = $attr;
    }
    return $category;
}

    观看现场演示

    这篇关于XML 复杂解析的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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