XMLReader::next()函数是PHP中的内置函数,用于将光标移到下一个跳过所有子树的节点。此函数的另一种用法是它接受直接移动到元素的节点名称。
用法:
bool XMLReader::next( string $localname )
参数:该函数接受单个参数$localname,该参数保存要移动到的下一个节点的名称。
返回值:如果成功,则此函数返回TRUE;如果失败,则返回FALSE。
以下示例程序旨在说明PHP中的XMLReader::next()函数:
程序1:在此程序中,我们将遍历XML树。
文档名称: data.xml
<?xml version="1.0" encoding="utf-8"?>
<div1>
<h1> Foo Bar </h1>
<div2>
<h1> Foo Bar </h1>
</div2>
</div1>
文档名称: index.php
<?php
// Create a new XMLReader instance
$XMLReader = new XMLReader();
// Open the XML file
$XMLReader->open('data.xml');
// Iterate through the XML nodes
// to reach the h1 node
$XMLReader->read();
$XMLReader->read();
$XMLReader->next();
// Print name of element
echo "Before:<br> We are currently"
. " at:$XMLReader->name<br>";
// Move to next node which is
// text "Foo Bar"
$XMLReader->next();
// Move to next element
// which is div2
$XMLReader->next();
// Print name of element
echo "After:<br> We are currently"
. " at:$XMLReader->name";
?>
输出:
之前:
We are currently at:h1
后:
We are currently at:div2
程序2:在此程序中,我们将移至XML树中的特定节点。
文档名称:data.xml
<?xml version="1.0" encoding="utf-8"?>
<div1>
<h1> Foo Bar </h1>
<div2>
<h1> Foo Bar </h1>
</div2>
<div3> Hello </div3>
</div1>
文档名称: index.php
<?php
// Create a new XMLReader instance
$XMLReader = new XMLReader();
// Open the XML file
$XMLReader->open('data.xml');
// Iterate through the XML nodes to
// reach the subtrees of div1
$XMLReader->read();
$XMLReader->read();
$XMLReader->next("div2");
// Print name of element
echo "Before:<br> We are currently"
. "at:$XMLReader->name<br>";
// Move to next node which is
// text "Foo Bar"
$XMLReader->next();
// Move to next element which is div2
$XMLReader->next();
// Print name of element
echo "After:<br> We are currently"
. " at:$XMLReader->name";
?>
输出:
之前:
We are currently at:div2
后:
We are currently at:div3
参考: https://www.php.net/manual/en/xmlreader.next.php
相关用法
- PHP XMLReader XML()用法及代码示例
- PHP XMLReader getAttribute()用法及代码示例
- PHP XMLReader moveToFirstAttribute()用法及代码示例
- PHP XMLReader moveToNextAttribute()用法及代码示例
- PHP XMLReader readInnerXml()用法及代码示例
- PHP XMLReader setRelaxNGSchema()用法及代码示例
- PHP XMLReader expand()用法及代码示例
- PHP XMLReader readString()用法及代码示例
- PHP XMLReader open()用法及代码示例
- PHP XMLReader close()用法及代码示例
- PHP XMLReader setSchema()用法及代码示例
- PHP XMLReader setRelaxNGSchemaSource()用法及代码示例
- PHP XMLReader readOuterXml()用法及代码示例
- PHP XMLReader lookupNamespace()用法及代码示例
- PHP XMLReader moveToAttributeNo()用法及代码示例
注:本文由纯净天空筛选整理自gurrrung大神的英文原创作品 PHP | XMLReader next() Function。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。