PHP XML Parser
Functions
PHP XML Parser Introduction
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 the 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 DTD linked to the document. However, if the document is poorly formed, it will end 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 handlers for XML events.
Installation
XML Parser functions are part of the PHP core. No installation is required to use these functions.
PHP XML Parser Functions
PHP: Indicates the earliest PHP version that supports the function.
Function | Description | PHP |
---|---|---|
utf8_decode() | Decodes a UTF-8 string to ISO-8859-1. | 3 |
utf8_encode() | Encodes an ISO-8859-1 string to UTF-8. | 3 |
xml_error_string() | Gets the error string from the XML parser. | 3 |
xml_get_current_byte_index() | Gets the current byte index from the XML parser. | 3 |
xml_get_current_column_number() | Gets the current column number from the XML parser. | 3 |
xml_get_current_line_number() | Gets the current line number from the XML parser. | 3 |
xml_get_error_code() | Gets the error code from the XML parser. | 3 |
xml_parse() | Parses an XML document. | 3 |
xml_parse_into_struct() | Parses XML data into an array. | 3 |
xml_parser_create_ns() | Creates an XML parser with namespace support. | 4 |
xml_parser_create() | Creates an XML parser. | 3 |
xml_parser_free() | Frees an XML parser. | 3 |
xml_parser_get_option() | Gets options from an XML parser. | 3 |
xml_parser_set_option() | Sets options in an XML parser. | 3 |
xml_set_character_data_handler() | Sets up a character data handler. | 3 |
xml_set_default_handler() | Sets up a default handler. | 3 |
xml_set_element_handler() | Sets up start and end element handlers. | 3 |
xml_set_end_namespace_decl_handler() | Sets up an end namespace declaration handler. | 4 |
xml_set_external_entity_ref_handler() | Set external entity reference handler. | 3 |
xml_set_notation_decl_handler() | Set notation declaration handler. | 3 |
xml_set_object() | Use XML parser within an object. | 4 |
xml_set_processing_instruction_handler() | Set processing instruction (PI) handler. | 3 |
xml_set_start_namespace_decl_handler() | Set start namespace declaration handler. | 4 |
xml_set_unparsed_entity_decl_handler() | Set 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) |