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PHP:xml_set_start_namespace_decl_handler()的用法_XML解析器函数
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(PHP 4 >= 4.0.5, PHP 5)
xml_set_start_namespace_decl_handler — 建立起始命名空间声明处理器
说明 bool xml_set_start_namespace_decl_handler ( resource $parser , callable $handler )Set a handler to be called when a namespace is declared. Namespace declarations occur inside start tags. But the namespace declaration start handler is called before the start tag handler for each namespace declared in that start tag.
参数parser
A reference to the XML parser.
handler
handler is a string containing the name of a function that must exist when xml_parse() is called for parser.
The function named by handler must accept three parameters, and should return an integer value. If the value returned from the handler is FALSE (which it will be if no value is returned), the XML parser will stop parsing and xml_get_error_code() will return XML_ERROR_EXTERNAL_ENTITY_HANDLING. handler ( resource $parser , string $prefix , string $uri )parser The first parameter, parser, is a reference to the XML parser calling the handler.prefix The prefix is a string used to reference the namespace within an XML object.uri Uniform Resource Identifier (URI) of namespace.
If a handler function is set to an empty string, or FALSE, the handler in question is disabled.
Note: 除了函数名，含有对象引用的数组和方法名也可以作为参数。
返回值成功时返回 TRUE， 或者在失败时返回 FALSE。
参见xml_set_end_namespace_decl_handler() - 建立终止命名空间声明处理器
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