PHP XML Parser Functions

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PHP XML Parser FunctionsPHP XML Parser Introduction

The XML functions lets you parse, but not validate, XML documents.

XML is a data format for standardized structured document exchange. More information on XML can be found in our XML Tutorial.

This extension uses the Expat XML parser.

Expat is an event-based parser, it views an XML document as a series of events. When an event occurs, it calls a specified function to handle it.

Expat is a non-validating parser, and ignores any DTDs linked to a document. However, if the document is not well formed it will end with an error message.

Because it is an event-based, non validating parser, Expat is fast and well suited for web applications.

The XML parser functions lets you create XML parsers and define handlers for XML events.


Installation

The XML functions are part of the PHP core. There is no installation needed to use these functions.


PHP XML Parser Functions

PHP: indicates the earliest version of PHP that supports the function.

FunctionDescriptionPHP
utf8_decode()Decodes an UTF-8 string to ISO-8859-13
utf8_encode()Encodes an ISO-8859-1 string to UTF-83
xml_error_string()Gets an error string from the XML parser3
xml_get_current_byte_index()Gets the current byte index from the XML parser3
xml_get_current_column_number()Gets the current column number from the XML parser3
xml_get_current_line_number()Gets the current line number from the XML parser3
xml_get_error_code()Gets an error code from the XML parser3
xml_parse()Parses an XML document3
xml_parse_into_struct()Parse XML data into an array3
xml_parser_create_ns()Create an XML parser with namespace support4
xml_parser_create()Create an XML parser3
xml_parser_free()Free an XML parser3
xml_parser_get_option()Get options from an XML parser3
xml_parser_set_option()Set options in an XML parser3
xml_set_character_data_handler()Set handler function for character data3
xml_set_default_handler()Set default handler function3
xml_set_element_handler()Set handler function for start and end element of elements3
xml_set_end_namespace_decl_handler()Set handler function for the end of namespace declarations4
xml_set_external_entity_ref_handler()Set handler function for external entities3
xml_set_notation_decl_handler()Set handler function for notation declarations3
xml_set_object()Use XML Parser within an object4
xml_set_processing_instruction_handler()Set handler function for processing instruction3
xml_set_start_namespace_decl_handler()Set handler function for the start of namespace declarations4
xml_set_unparsed_entity_decl_handler()Set handler function for unparsed entity declarations3

 


PHP XML Parser Constants

Constant
XML_ERROR_NONE (integer)
XML_ERROR_NO_MEMORY (integer)
XML_ERROR_SYNTAX (integer)
XML_ERROR_NO_ELEMENTS (integer)
XML_ERROR_INVALID_TOKEN (integer)
XML_ERROR_UNCLOSED_TOKEN (integer)
XML_ERROR_PARTIAL_CHAR (integer)
XML_ERROR_TAG_MISMATCH (integer)
XML_ERROR_DUPLICATE_ATTRIBUTE (integer)
XML_ERROR_JUNK_AFTER_DOC_ELEMENT (integer)
XML_ERROR_PARAM_ENTITY_REF (integer)
XML_ERROR_UNDEFINED_ENTITY (integer)
XML_ERROR_RECURSIVE_ENTITY_REF (integer)
XML_ERROR_ASYNC_ENTITY (integer)
XML_ERROR_BAD_CHAR_REF (integer)
XML_ERROR_BINARY_ENTITY_REF (integer)
XML_ERROR_ATTRIBUTE_EXTERNAL_ENTITY_REF (integer)
XML_ERROR_MISPLACED_XML_PI (integer)
XML_ERROR_UNKNOWN_ENCODING (integer)
XML_ERROR_INCORRECT_ENCODING (integer)
XML_ERROR_UNCLOSED_CDATA_SECTION (integer)
XML_ERROR_EXTERNAL_ENTITY_HANDLING (integer)
XML_OPTION_CASE_FOLDING (integer)
XML_OPTION_TARGET_ENCODING (integer)
XML_OPTION_SKIP_TAGSTART (integer)
XML_OPTION_SKIP_WHITE (integer)
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