使用PHP將屬性添加到子節點XML

Question

我正在努力在具有靜態唯一ID的XML文件中追加子節點。

我正在使用的XML提要托管在其他地方的服務器上，只能通過其URL訪問。

所述飼料遵循以下這種模式：

<?xml version="1.0" encoding="UTF-8"?>
<properties>
    <property>
        <title>Some Sunny Place</title>
        <address>Some Building, Somewhere, Really Nice</address>
    </property>
    <property>
        <title>Some Rainy PLace Place</title>
        <address>Some Gutter, Somewhere, Not So Nice</address>
    </property>
</properties>

我想要實現的是使用feed中的URL為“property”節點添加一個唯一的id，並在備用URL處輸出XML feed。

例如example.com/proeprty-feed包含沒有ID的feed。 使用PHP添加ID並將feed輸出到something.com/property-feed

<?xml version="1.0" encoding="UTF-8"?>
<properties>
    <property upid=123456>
        <title>Some Sunny Place</title>
        <address>Some Building, Somewhere, Really Nice</address>
    </property>
    <property upid=abcdef>
        <title>Some Rainy PLace Place</title>
        <address>Some Gutter, Somewhere, Not So Nice</address>
    </property>
</properties>

我試過的是input.php

<?php
$xmlstr = <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<properties>
    <property>
        <title>Some Sunny Place</title>
        <address>Some Building, Somewhere, Really Nice</address>
    </property>
    <property>
        <title>Some Rainy PLace Place</title>
        <address>Some Gutter, Somewhere, Not So Nice</address>
    </property>
</properties>
XML;
?>

和output.php

<?php

include 'input.php';

$sxe = new SimpleXMLElement($xmlstr);
$sxe->addAttribute('upid', uniqid('prop-'));

echo $sxe->asXML();

?>

但這輸出：

<properties upid="prop-5ac7c06a39ddd">
    <property>
        <title>Some Sunny Place</title>
        <address>Some Building, Somewhere, Really Nice</address>
    </property>
    <property>
        <title>Some Rainy PLace Place</title>
        <address>Some Gutter, Somewhere, Not So Nice</address>
    </property>
</properties>

Answer 1

有點像這樣：

<?php

$string = '<?xml version="1.0" encoding="UTF-8"?>
<properties>
    <property>
        <title>Some Sunny Place</title>
        <address>Some Building, Somewhere, Really Nice</address>
    </property>
    <property>
        <title>Some Rainy PLace Place</title>
        <address>Some Gutter, Somewhere, Not So Nice</address>
    </property>
</properties>';
$xml = new SimpleXMLElement($string);

for($i = 0; $i < count($xml -> property); $i++) {
    $xml -> property[$i] -> addAttribute('upid', uniqid());
}
header('Content-Type: text/xml');
print $xml -> asXml();

Answer 2

<?php
$xml = '<?xml version="1.0" encoding="UTF-8"?>
<properties>
    <property>
        <title>Some Sunny Place</title>
        <address>Some Building, Somewhere, Really Nice</address>
    </property>
    <property>
        <title>Some Rainy PLace Place</title>
        <address>Some Gutter, Somewhere, Not So Nice</address>
    </property>
</properties>';

$length = strlen('<property>');

while ($pos = strpos($xml, '<property>')) {
    $xml = substr_replace($xml, '<property upid=' . uniqid() . '>', $pos, $length);
    usleep(10); // Necessary so uniqid() is unique every iteration, it's kind of a hack not sure if it's the best solution
}

var_dump($xml);