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PHP XML Parser Functions


Introduction to PHP XML Parser

XML functions allow you to parse XML documents but cannot validate them.

XML is a data format for standard structured document exchange. You can find more information about XML in our XML tutorial .

This extension uses the Expat XML parser.

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

Expat is an unauthenticated parser, ignoring any DTDs linked to the document. However, if the document is not well-formed, it ends with an error message.

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

XML parser functions allow you to create XML parsers and define handles for XML events.


Installation

XML Parser functions are a core part of PHP. No installation is required to use these functions.


PHP XML Parser function

PHP : Indicates the earliest version of PHP that supports this function.

Function Description PHP
utf8_decode () Decodes UTF_8 strings into ISO_8859_1. 3
utf8_encode () Encodes ISO_8859_1 strings as UTF_8. 3
xml_error_string () Gets the error string of the XML parser. 3
xml_get_current_byte_index () Gets the current byte index of the XML parser. 3
xml_get_current_column_number () Gets the current column number of the XML parser. 3
xml_get_current_line_number () Gets the current line number of the XML parser. 3
xml_get_error_code () Get the error code of the XML parser. 3
xml_parse () Parse the XML document. 3
xml_parse_into_struct () Parse XML data into an array. 3
xml_parser_create_ns () Create an XML parser with namespace support. 4
xml_parser_create () Create an XML parser. 3
xml_parser_free () Releasing the XML parser. 3
xml_parser_get_option () Get options from an XML parser. 3
xml_parser_set_option () Set options for the XML parser. 3
xml_set_character_data_handler () Create a character data processor. 3
xml_set_default_handler () Create a default processor. 3
xml_set_element_handler () Create start and end element handlers. 3
xml_set_end_namespace_decl_handler () Create a termination namespace declaration handler. 4
xml_set_external_entity_ref_handler () Create an external entity processor. 3
xml_set_notation_decl_handler () Create a symbol declaration handler. 3
xml_set_object () Use an XML parser in the object. 4
xml_set_processing_instruction_handler () Create a processing instruction (PI) processor. 3
xml_set_start_namespace_decl_handler () Create a starting namespace declaration handler. 4
xml_set_unparsed_entity_decl_handler () Create an unparsed entity declaration handler. 3


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)