PHP扩展之XMLReader的示例分析-创新互联

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创新互联公司主要企业基础官网建设，电商平台建设，移动手机平台，微信小程序等一系列专为中小企业按需定制设计产品体系；应对中小企业在互联网运营的各种问题，为中小企业在互联网的运营中保驾护航。一、概述及安装

The XMLReader extension is an XML Pull parser. The reader acts as a cursor going forward on the document stream and stopping at each node on the way.

It is important to note that internally, libxml uses the UTF-8 encoding and as such, the encoding of the retrieved contents will always be in UTF-8 encoding.

此扩展需要 libxml PHP 扩展。这表示需要使用 --enable-libxml ，尽管这将隐式完成因为 libxml 是缺省开启的。

The XMLReader extension was initially a PECL extension for PHP 5. It was later moved to the PHP source (bundled) as of PHP 5.1.0, and later enabled by default as of PHP 5.1.2.

此扩展默认为启用,编译时可通过下列选项禁用： --disable-xmlreader

二、XMLReader类及其成员函数

• XMLReader::close — Close the XMLReader input

• XMLReader::expand — Returns a copy of the current node as a DOM object

• XMLReader::getAttribute — Get the value of a named attribute

• XMLReader::getAttributeNo — Get the value of an attribute by index

• XMLReader::getAttributeNs — Get the value of an attribute by localname and URI

• XMLReader::getParserProperty — Indicates if specified property has been set

• XMLReader::isValid — Indicates if the parsed document is valid

• XMLReader::lookupNamespace — Lookup namespace for a prefix

• XMLReader::moveToAttribute — Move cursor to a named attribute

• XMLReader::moveToAttributeNo — Move cursor to an attribute by index

• XMLReader::moveToAttributeNs — Move cursor to a named attribute

• XMLReader::moveToElement — Position cursor on the parent Element of current Attribute

• XMLReader::moveToFirstAttribute — Position cursor on the first Attribute

• XMLReader::moveToNextAttribute — Position cursor on the next Attribute

• XMLReader::next — Move cursor to next node skipping all subtrees

• XMLReader::open — Set the URI containing the XML to parse

• XMLReader::read — Move to next node in document

• XMLReader::readInnerXML — Retrieve XML from current node

• XMLReader::readOuterXML — Retrieve XML from current node, including it self

• XMLReader::readString — Reads the contents of the current node as a string

• XMLReader::setParserProperty — Set parser options

• XMLReader::setRelaxNGSchema — Set the filename or URI for a RelaxNG Schema

• XMLReader::setRelaxNGSchemaSource — Set the data containing a RelaxNG Schema

• XMLReader::setSchema — Validate document against XSD

• XMLReader::XML — Set the data containing the XML to parse

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