Rev 1713 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | RSS feed
<?php//// +----------------------------------------------------------------------+// | PHP Version 4 |// +----------------------------------------------------------------------+// | Copyright (c) 1997-2004 The PHP Group |// +----------------------------------------------------------------------+// | This source file is subject to version 3.0 of the PHP license, |// | that is bundled with this package in the file LICENSE, and is |// | available at through the world-wide-web at |// | http://www.php.net/license/3_0.txt. |// | If you did not receive a copy of the PHP license and are unable to |// | obtain it through the world-wide-web, please send a note to |// | license@php.net so we can mail you a copy immediately. |// +----------------------------------------------------------------------+// | Author: Stig Bakken <ssb@fast.no> |// | Tomas V.V.Cox <cox@idecnet.com> |// | Stephan Schmidt <schst@php-tools.net> |// +----------------------------------------------------------------------+//// $Id: Parser.php,v 1.3 2007-11-19 15:11:00 jp_milcent Exp $/*** XML Parser class.** This is an XML parser based on PHP's "xml" extension,* based on the bundled expat library.** @category XML* @package XML_Parser* @author Stig Bakken <ssb@fast.no>* @author Tomas V.V.Cox <cox@idecnet.com>* @author Stephan Schmidt <schst@php-tools.net>*//*** uses PEAR's error handling*/require_once 'PEAR.php';/*** resource could not be created*/define('XML_PARSER_ERROR_NO_RESOURCE', 200);/*** unsupported mode*/define('XML_PARSER_ERROR_UNSUPPORTED_MODE', 201);/*** invalid encoding was given*/define('XML_PARSER_ERROR_INVALID_ENCODING', 202);/*** specified file could not be read*/define('XML_PARSER_ERROR_FILE_NOT_READABLE', 203);/*** invalid input*/define('XML_PARSER_ERROR_INVALID_INPUT', 204);/*** remote file cannot be retrieved in safe mode*/define('XML_PARSER_ERROR_REMOTE', 205);/*** XML Parser class.** This is an XML parser based on PHP's "xml" extension,* based on the bundled expat library.** Notes:* - It requires PHP 4.0.4pl1 or greater* - From revision 1.17, the function names used by the 'func' mode* are in the format "xmltag_$elem", for example: use "xmltag_name"* to handle the <name></name> tags of your xml file.** @category XML* @package XML_Parser* @author Stig Bakken <ssb@fast.no>* @author Tomas V.V.Cox <cox@idecnet.com>* @author Stephan Schmidt <schst@php-tools.net>* @todo create XML_Parser_Namespace to parse documents with namespaces* @todo create XML_Parser_Pull* @todo Tests that need to be made:* - mixing character encodings* - a test using all expat handlers* - options (folding, output charset)* - different parsing modes*/class XML_Parser extends PEAR{// {{{ properties/*** XML parser handle** @var resource* @see xml_parser_create()*/var $parser;/*** File handle if parsing from a file** @var resource*/var $fp;/*** Whether to do case folding** If set to true, all tag and attribute names will* be converted to UPPER CASE.** @var boolean*/var $folding = true;/*** Mode of operation, one of "event" or "func"** @var string*/var $mode;/*** Mapping from expat handler function to class method.** @var array*/var $handler = array('character_data_handler' => 'cdataHandler','default_handler' => 'defaultHandler','processing_instruction_handler' => 'piHandler','unparsed_entity_decl_handler' => 'unparsedHandler','notation_decl_handler' => 'notationHandler','external_entity_ref_handler' => 'entityrefHandler');/*** source encoding** @var string*/var $srcenc;/*** target encoding** @var string*/var $tgtenc;/*** handler object** @var object*/var $_handlerObj;/*** valid encodings** @var array*/var $_validEncodings = array('ISO-8859-1', 'UTF-8', 'US-ASCII');// }}}// {{{ constructor/*** Creates an XML parser.** This is needed for PHP4 compatibility, it will* call the constructor, when a new instance is created.** @param string $srcenc source charset encoding, use NULL (default) to use* whatever the document specifies* @param string $mode how this parser object should work, "event" for* startelement/endelement-type events, "func"* to have it call functions named after elements* @param string $tgenc a valid target encoding*/function XML_Parser($srcenc = null, $mode = 'event', $tgtenc = null){XML_Parser::__construct($srcenc, $mode, $tgtenc);}// }}}/*** PHP5 constructor** @param string $srcenc source charset encoding, use NULL (default) to use* whatever the document specifies* @param string $mode how this parser object should work, "event" for* startelement/endelement-type events, "func"* to have it call functions named after elements* @param string $tgenc a valid target encoding*/function __construct($srcenc = null, $mode = 'event', $tgtenc = null){$this->PEAR('XML_Parser_Error');$this->mode = $mode;$this->srcenc = $srcenc;$this->tgtenc = $tgtenc;}// }}}/*** Sets the mode of the parser.** Possible modes are:* - func* - event** You can set the mode using the second parameter* in the constructor.** This method is only needed, when switching to a new* mode at a later point.** @access public* @param string mode, either 'func' or 'event'* @return boolean|object true on success, PEAR_Error otherwise*/function setMode($mode){if ($mode != 'func' && $mode != 'event') {$this->raiseError('Unsupported mode given', XML_PARSER_ERROR_UNSUPPORTED_MODE);}$this->mode = $mode;return true;}/*** Sets the object, that will handle the XML events** This allows you to create a handler object independent of the* parser object that you are using and easily switch the underlying* parser.** If no object will be set, XML_Parser assumes that you* extend this class and handle the events in $this.** @access public* @param object object to handle the events* @return boolean will always return true* @since v1.2.0beta3*/function setHandlerObj(&$obj){$this->_handlerObj = &$obj;return true;}/*** Init the element handlers** @access private*/function _initHandlers(){if (!is_resource($this->parser)) {return false;}if (!is_object($this->_handlerObj)) {$this->_handlerObj = &$this;}switch ($this->mode) {case 'func':xml_set_object($this->parser, $this->_handlerObj);xml_set_element_handler($this->parser, array(&$this, 'funcStartHandler'), array(&$this, 'funcEndHandler'));break;case 'event':xml_set_object($this->parser, $this->_handlerObj);xml_set_element_handler($this->parser, 'startHandler', 'endHandler');break;default:return $this->raiseError('Unsupported mode given', XML_PARSER_ERROR_UNSUPPORTED_MODE);break;}/*** set additional handlers for character data, entities, etc.*/foreach ($this->handler as $xml_func => $method) {if (method_exists($this->_handlerObj, $method)) {$xml_func = 'xml_set_' . $xml_func;$xml_func($this->parser, $method);}}}// {{{ _create()/*** create the XML parser resource** Has been moved from the constructor to avoid* problems with object references.** Furthermore it allows us returning an error* if something fails.** @access private* @return boolean|object true on success, PEAR_Error otherwise** @see xml_parser_create*/function _create(){if ($this->srcenc === null) {$xp = @xml_parser_create();} else {$xp = @xml_parser_create($this->srcenc);}if (is_resource($xp)) {if ($this->tgtenc !== null) {if (!@xml_parser_set_option($xp, XML_OPTION_TARGET_ENCODING,$this->tgtenc)) {return $this->raiseError('invalid target encoding', XML_PARSER_ERROR_INVALID_ENCODING);}}$this->parser = $xp;$result = $this->_initHandlers($this->mode);if ($this->isError($result)) {return $result;}xml_parser_set_option($xp, XML_OPTION_CASE_FOLDING, $this->folding);return true;}if (!in_array(strtoupper($this->srcenc), $this->_validEncodings)) {return $this->raiseError('invalid source encoding', XML_PARSER_ERROR_INVALID_ENCODING);}return $this->raiseError('Unable to create XML parser resource.', XML_PARSER_ERROR_NO_RESOURCE);}// }}}// {{{ reset()/*** Reset the parser.** This allows you to use one parser instance* to parse multiple XML documents.** @access public* @return boolean|object true on success, PEAR_Error otherwise*/function reset(){$result = $this->_create();if ($this->isError( $result )) {return $result;}return true;}// }}}// {{{ setInputFile()/*** Sets the input xml file to be parsed** @param string Filename (full path)* @return resource fopen handle of the given file* @throws XML_Parser_Error* @see setInput(), setInputString(), parse()* @access public*/function setInputFile($file){/*** check, if file is a remote file*/if (eregi('^(http|ftp)://', substr($file, 0, 10))) {if (!ini_get('allow_url_fopen')) {return $this->raiseError('Remote files cannot be parsed, as safe mode is enabled.', XML_PARSER_ERROR_REMOTE);}}$fp = @fopen($file, 'rb');if (is_resource($fp)) {$this->fp = $fp;return $fp;}return $this->raiseError('File could not be opened.', XML_PARSER_ERROR_FILE_NOT_READABLE);}// }}}// {{{ setInputString()/*** XML_Parser::setInputString()** Sets the xml input from a string** @param string $data a string containing the XML document* @return null**/function setInputString($data){$this->fp = $data;return null;}// }}}// {{{ setInput()/*** Sets the file handle to use with parse().** You should use setInputFile() or setInputString() if you* pass a string** @param mixed $fp Can be either a resource returned from fopen(),* a URL, a local filename or a string.* @access public* @see parse()* @uses setInputString(), setInputFile()*/function setInput($fp){if (is_resource($fp)) {$this->fp = $fp;return true;}// see if it's an absolute URL (has a scheme at the beginning)elseif (eregi('^[a-z]+://', substr($fp, 0, 10))) {return $this->setInputFile($fp);}// see if it's a local fileelseif (file_exists($fp)) {return $this->setInputFile($fp);}// it must be a stringelse {$this->fp = $fp;return true;}return $this->raiseError('Illegal input format', XML_PARSER_ERROR_INVALID_INPUT);}// }}}// {{{ parse()/*** Central parsing function.** @return true|object PEAR error returns true on success, or a PEAR_Error otherwise* @access public*/function parse(){/*** reset the parser*/$result = $this->reset();if ($this->isError($result)) {return $result;}// if $this->fp was fopened previouslyif (is_resource($this->fp)) {while ($data = fread($this->fp, 4096)) {if (!$this->_parseString($data, feof($this->fp))) {$error = &$this->raiseError();$this->free();return $error;}}// otherwise, $this->fp must be a string} else {if (!$this->_parseString($this->fp, true)) {$error = &$this->raiseError();$this->free();return $error;}}$this->free();return true;}/*** XML_Parser::_parseString()** @param string $data* @param boolean $eof* @return bool* @access private* @see parseString()**/function _parseString($data, $eof = false){return xml_parse($this->parser, $data, $eof);}// }}}// {{{ parseString()/*** XML_Parser::parseString()** Parses a string.** @param string $data XML data* @param boolean $eof If set and TRUE, data is the last piece of data sent in this parser* @throws XML_Parser_Error* @return Pear Error|true true on success or a PEAR Error* @see _parseString()*/function parseString($data, $eof = false){if (!isset($this->parser) || !is_resource($this->parser)) {$this->reset();}if (!$this->_parseString($data, $eof)) {$error = &$this->raiseError();$this->free();return $error;}if ($eof === true) {$this->free();}return true;}/*** XML_Parser::free()** Free the internal resources associated with the parser** @return null**/function free(){if (isset($this->parser) && is_resource($this->parser)) {xml_parser_free($this->parser);unset( $this->parser );}if (isset($this->fp) && is_resource($this->fp)) {fclose($this->fp);}unset($this->fp);return null;}/*** XML_Parser::raiseError()** Throws a XML_Parser_Error** @param string $msg the error message* @param integer $ecode the error message code* @return XML_Parser_Error**/function raiseError($msg = null, $ecode = 0){$msg = !is_null($msg) ? $msg : $this->parser;$err = &new XML_Parser_Error($msg, $ecode);return parent::raiseError($err);}// }}}// {{{ funcStartHandler()function funcStartHandler($xp, $elem, $attribs){$func = 'xmltag_' . $elem;$func = str_replace(array('.', '-', ':'), '_', $func);if (method_exists($this->_handlerObj, $func)) {call_user_func(array(&$this->_handlerObj, $func), $xp, $elem, $attribs);} elseif (method_exists($this->_handlerObj, 'xmltag')) {call_user_func(array(&$this->_handlerObj, 'xmltag'), $xp, $elem, $attribs);}}// }}}// {{{ funcEndHandler()function funcEndHandler($xp, $elem){$func = 'xmltag_' . $elem . '_';$func = str_replace(array('.', '-', ':'), '_', $func);if (method_exists($this->_handlerObj, $func)) {call_user_func(array(&$this->_handlerObj, $func), $xp, $elem);} elseif (method_exists($this->_handlerObj, 'xmltag_')) {call_user_func(array(&$this->_handlerObj, 'xmltag_'), $xp, $elem);}}// }}}// {{{ startHandler()/**** @abstract*/function startHandler($xp, $elem, &$attribs){return NULL;}// }}}// {{{ endHandler()/**** @abstract*/function endHandler($xp, $elem){return NULL;}// }}}me}/*** error class, replaces PEAR_Error** An instance of this class will be returned* if an error occurs inside XML_Parser.** There are three advantages over using the standard PEAR_Error:* - All messages will be prefixed* - check for XML_Parser error, using is_a( $error, 'XML_Parser_Error' )* - messages can be generated from the xml_parser resource** @package XML_Parser* @access public* @see PEAR_Error*/class XML_Parser_Error extends PEAR_Error{// {{{ properties/*** prefix for all messages** @var string*/var $error_message_prefix = 'XML_Parser: ';// }}}// {{{ constructor()/*** construct a new error instance** You may either pass a message or an xml_parser resource as first* parameter. If a resource has been passed, the last error that* happened will be retrieved and returned.** @access public* @param string|resource message or parser resource* @param integer error code* @param integer error handling* @param integer error level*/function XML_Parser_Error($msgorparser = 'unknown error', $code = 0, $mode = PEAR_ERROR_RETURN, $level = E_USER_NOTICE){if (is_resource($msgorparser)) {$code = xml_get_error_code($msgorparser);$msgorparser = sprintf('%s at XML input line %d:%d',xml_error_string($code),xml_get_current_line_number($msgorparser),xml_get_current_column_number($msgorparser));}$this->PEAR_Error($msgorparser, $code, $mode, $level);}// }}}}?>