PHP - XMLReader::expand() 函式

定義和用法

XML 是一種用於在網路上共享資料的標記語言，XML 既可供人類閱讀，也可供機器讀取。XMLReader 擴充套件用於讀取/檢索 XML 文件的內容，即使用 XMLReader 類的函式，可以讀取 XML 文件的每個節點。

XMLReader::expand() 函式是 XMLReader 類的一個函式，它複製當前節點的內容並將其作為 DOM 物件返回。

語法

XMLReader::expand([$base]);

引數

返回值

此函式返回 DOMNode 類的物件。如果出現問題，則返回布林值 FALSE。

PHP 版本

此函式首次引入 PHP 5 版本，並在所有後續版本中可用。

示例

以下是此函式帶可選引數的示例：

data.xml

<Tutorials>
   <Tutorial>
      <Name>JavaFX</Name>
      <Pages>535</Pages>
      <Author>Krishna</Author>
      <Version>11</Version>
   </Tutorial>

   <Tutorial>
      <Name>CoffeeScript</Name>
      <Pages>235</Pages>
      <Author>Kasyap</Author>
      <Version>2.5.1</Version>
   </Tutorial>
</Tutorials>

sample.php

<?php
   //Creating an XMLReader
   $reader = new XMLReader();

   //Opening a reader
   $reader->open("mydata.xml");

   //Reading the contents
   $reader->read();

   $data = $reader->expand();
   print_r($data);

   //Closing the reader
   $reader->close();
?>

這將產生以下結果：

DOMElement Object (
   [tagName] => Tutorials
   [schemaTypeInfo] =>
   [nodeName] => Tutorials
   [nodeValue] =>
   JavaFX
   535
   Krishna
   11

   CoffeeScript
   235
   Kasyap
   2.5.1

   [nodeType] => 1
   [parentNode] =>
   [childNodes] => (object value omitted)
   [firstChild] => (object value omitted)
   [lastChild] => (object value omitted)
   [previousSibling] =>
   [nextSibling] =>
   [attributes] => (object value omitted)
   [namespaceURI] =>
   [prefix] =>
   [localName] => Tutorials
   [baseURI] =>
   [textContent] =>

   JavaFX
   535
   Krishna
   11

   CoffeeScript
   235
   Kasyap
   2.5.1
)

示例

以下是此函式的另一個示例：

<?php
   //Creating an XMLReader
   $reader = new XMLReader();

   $data = "<data> 
      <name>Raju</name> 
      <age>32</age> 
      <phone>9848022338</phone> 
      <city>Hyderabad</city>
   </data> ";

   //Opening a reader
   $reader->xml($data);

   //Reading the contents
   $reader->read();

   $data = $reader->expand();
   print_r($data);

   //Closing the reader
   $reader->close();
?>

這將產生以下結果：

DOMElement Object (
   [tagName] => data
   [schemaTypeInfo] =>
   [nodeName] => data
   [nodeValue] =>
   Raju
   32
   9848022338
   Hyderabad

   [nodeType] => 1
   [parentNode] =>
   [childNodes] => (object value omitted)
   [firstChild] => (object value omitted)
   [lastChild] => (object value omitted)
   [previousSibling] =>
   [nextSibling] =>
   [attributes] => (object value omitted)
   [namespaceURI] =>
   [prefix] =>
   [localName] => data
   [baseURI] =>
   [textContent] =>
   Raju
   32
   9848022338
   Hyderabad
)

示例

mydata.xml

<data> 
   <name>Raju</name> 
   <age>32</age> 
   <phone>9848022338</phone> 
	<city>Hyderabad</city>
</data> 

sample.php

<?php
   //Creating an XMLReader
   $reader = new XMLReader();

   //Opening a reader
   $reader->open("test.xml");

   //Reading the contents
   $reader->read();
   $ele = $reader->expand();

   $doc = new DOMDocument(); 
   $doc->appendChild($ele); 

   $res = $doc->saveXML();
   print_r($res);

   //Closing the reader
   $reader->close();
?>

這將產生以下結果：

<?xml version="1.0"?>
<data>
   <name>Raju</name>
   <age>32</age>
   <phone>9848022338</phone>
   <city>Hyderabad</city>
</data>