Question

这是我用来在admin_xml.php

中发送XML数据的简单表单

<form name="review" action="admin_xml.php" method="post">
 <textarea name="xml" cols="40" rows="10"></textarea>
 <input class="submit" type="submit" value="Submit Request">
</form>

这是我输入的XML，用于从MySQL数据库中检索数据

<?xml version="1.0" encoding="UTF-8"?>
<GetOrdersIds>
    <Credentials>
        <Username>my_username</Username>
        <Password>my_password</Password>
    </Credentials>
    <Criterions>
        <OrderNumber></OrderNumber>
        <StartDate>2009-01-01</StartDate>
        <EndDate>2009-07-01</EndDate>
    </Criterions>
</GetOrdersIds>

这是从xml中提取标签的php代码：

<?php    

$text_all = "<?xml version=\"1.0\"?>\r\n<GetOrdersIds version=\"1.0\">\r\n<Credentials>\r\n<Username>my_username</Username>\r\n<Password>my_password</Password>\r\n</Credentials>\r\n<Criterions>\r\n<OrderNumber></OrderNumber>\r\n<StartDate>2009-01-01</StartDate>\r\n<EndDate>2009-07-01</EndDate>\r\n</Criterions>\r\n</GetOrdersIds>";

$field = "Criterions";

$result = substr($text_all, strpos($text_all, "<".$field.">")+strlen("<".$field.">"), strpos($text_all, "</".$field.">")-strlen("<".$field.">")-strpos($text_all, "<".$field.">"));


?>

以上php代码的结果是：

<OrderNumber></OrderNumber>
<StartDate>2009-01-01</StartDate>
<EndDate>2009-07-01</EndDate>

当脚本运行时，php代码会遍历我的mysql数据，并提取上面给出的开始日期和结束日期之间的所有订单。

是否有更好的方法来改进以下PHP代码，以便它执行相同的功能：

$result = substr($text_all, strpos($text_all, "<".$field.">")+strlen("<".$field.">"), strpos($text_all, "</".$field.">")-strlen("<".$field.">")-strpos($text_all, "<".$field.">"));

这是搜索xml数据并检索所有标记的代码。

更新：

任何人都可以在SimpleXML中列出$ result代码吗？

Answer 1

一些临时变量会有所帮助，也更容易阅读。

$result = substr($text_all, strpos($text_all, "<".$field.">")+strlen("<".$field.">"), strpos($text_all, "</".$field.">")-strlen("<".$field.">")-strpos($text_all, "<".$field.">"));

可以改写为。

$tagLen = strlen('<'.$field.'>');
$openTag = strpos($text_all, '<'.$field.'>');
$closeTag = strpos($text_all, '</'.$field.'>', $openTag);

$result = substr($text_all, $openTag + $tagLen, $closeTag - $tagLen - $openTag);

或使用SimpleXML

$doc = simplexml_load_string($text_all);
echo $doc->Criterions->asXML();

如果您希望单个值使用此值。

$doc = simplexml_load_string($text_all);

echo $doc->Criterions->OrderNumber;
echo $doc->Criterions->StartDate;
echo $doc->Criterions->EndDate;

如果你想要XML格式的元素，那么使用asXML（）：

$doc = simplexml_load_string($text_all);

echo $doc->Criterions->OrderNumber->asXML();
echo $doc->Criterions->StartDate->asXML();
echo $doc->Criterions->EndDate->asXML();

Answer 2

使用SimpleXML：

<?php
$xmlSTR = '<?xml version="1.0" encoding="UTF-8"?>
<GetOrdersIds>
    <Credentials>
        <Username>my_username</Username>
        <Password>my_password</Password>
    </Credentials>
    <Criterions>
        <OrderNumber></OrderNumber>
        <StartDate>2009-01-01</StartDate>
        <EndDate>2009-07-01</EndDate>
    </Criterions>
</GetOrdersIds>';

$xml = new SimpleXMLElement($xmlSTR);

echo $xml->Credentials->Username;

//To see the entire structure print_r($xml); as php can access objects as arrays

Answer 3

查看simplexml模块。

Answer 4

使用像SimpleXML这样的XML解析器来提取数据：

$doc = simplexml_load_string($_POST['xml']);
$OrderNumber = $doc->Criterions->OrderNumber;
$StartDate = $doc->Criterions->StartDate;
$EndDate = $doc->Criterions->EndDate;

Answer 5

假设您的XML字符串存储在名为$text_all的变量中（如您在示例中所示），这将为您提供您想要的人...： - ）

$mysql_stuff = '';
$xml = new SimpleXMLElement($text_all);

foreach($xml->Criterions->children() as $criterion) {
    $mysql_stuff .= $criterion->asXML()."\n";
}
echo $mysql_stuff;

$mysql_stuff现在将包含：

<OrderNumber/>
<StartDate>2009-01-01</StartDate>
<EndDate>2009-07-01</EndDate>

我测试了这个并且它有效。我希望这回答了你的问题！

如何在PHP中改进以下代码

5 个答案: