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PHP5中文手册
XMLReader functions
简介
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.
Encoding
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.
安装
The XMLReader extension is available in PECL as of PHP 5.0.0 and is
included and enabled as of PHP 5.1.0 by default. It can be enabled
by adding the argument --enable-xmlreader
(or --with-xmlreader before 5.1.0)
to your configure line. The libxml
extension is required.
预定义类
XMLReader
属性
| Name |
Type |
Read-only |
Description |
| attributeCount |
int |
yes |
The number of attributes on the node |
| baseURI |
string |
yes |
The base URI of the node |
| depth |
int |
yes |
Depth of the node in the tree starting at 0 |
| hasAttributes |
bool |
yes |
Indicates if node has attributes |
| hasValue |
bool |
yes |
Indicates if node has a text value |
| isDefault |
bool |
yes |
Indicates if attribute is defaulted from DTD |
| isEmptyElement |
bool |
yes |
Indicates if node is an empty element tag |
| localName |
string |
yes |
The local name of the node |
| name |
string |
yes |
The qualified name of the node |
| namespaceURI |
string |
yes |
The URI of the namespace associated with the node |
| nodeType |
int |
yes |
The node type for the node |
| prefix |
string |
yes |
The prefix of the namespace associated with the node |
| value |
string |
yes |
The text value of the node |
| xmlLang |
string |
yes |
The xml:lang scope which the node resides |
预定义常量
以下常量由本扩展模块定义，因此只有在本扩展模块被编译到
PHP 中，或者在运行时被动态加载后才有效。
Warning
XMLReader uses class constants since PHP 5.1. Prior releases use global
constants in the form XMLREADER_ELEMENT.
XMLReader Node Types
| Constant |
Value |
Description |
|
XMLReader::NONE
(integer)
|
0 |
No node type |
|
XMLReader::ELEMENT
(integer)
|
1 |
Start element |
|
XMLReader::ATTRIBUTE
(integer)
|
2 |
Attribute node |
|
XMLReader::TEXT
(integer)
|
3 |
Text node |
|
XMLReader::CDATA
(integer)
|
4 |
CDATA node |
|
XMLReader::ENTITY_REF
(integer)
|
5 |
Entity Reference node |
|
XMLReader::ENTITY
(integer)
|
6 |
Entity Declaration node |
|
XMLReader::PI
(integer)
|
7 |
Processing Instruction node |
|
XMLReader::COMMENT
(integer)
|
8 |
Comment node |
|
XMLReader::DOC
(integer)
|
9 |
Document node |
|
XMLReader::DOC_TYPE
(integer)
|
10 |
Document Type node |
|
XMLReader::DOC_FRAGMENT
(integer)
|
11 |
Document Fragment node |
|
XMLReader::NOTATION
(integer)
|
12 |
Notation node |
|
XMLReader::WHITESPACE
(integer)
|
13 |
Whitespace node |
|
XMLReader::SIGNIFICANT_WHITESPACE
(integer)
|
14 |
Significant Whitespace node |
|
XMLReader::END_ELEMENT
(integer)
|
15 |
End Element |
|
XMLReader::END_ENTITY
(integer)
|
16 |
End Entity |
|
XMLReader::XML_DECLARATION
(integer)
|
17 |
XML Declaration node |
XMLReader Parser Options
| Constant |
Value |
Description |
|
XMLReader::LOADDTD
(integer)
|
1 |
Load DTD but do not validate |
|
XMLReader::DEFAULTATTRS
(integer)
|
2 |
Load DTD and default attributes but do not validate |
|
XMLReader::VALIDATE
(integer)
|
3 |
Load DTD and validate while parsing |
|
XMLReader::SUBST_ENTITIES
(integer)
|
4 |
Substitute entities and expand references |
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