xml.php

   1 <?php
   2 /*=====================================================================*\
   3 || ###################################################################
   4 || # Iris Studios Shared Object Framework [#]version[#]
   5 || # Copyright ©2002-[#]year[#] Iris Studios, Inc.
   6 || #
   7 || # This program is free software; you can redistribute it and/or modify
   8 || # it under the terms of the GNU General Public License as published by
   9 || # the Free Software Foundation; version [#]gpl[#] of the License.
  10 || #
  11 || # This program is distributed in the hope that it will be useful, but
  12 || # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13 || # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  14 || # more details.
  15 || #
  16 || # You should have received a copy of the GNU General Public License along
  17 || # with this program; if not, write to the Free Software Foundation, Inc.,
  18 || # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  19 || ###################################################################
  20 \*=====================================================================*/
  21
  22 /**
  23 * XML Parser
  24 * xml.php
  25 *
  26 * @package      ISSO
  27 */
  28
  29 /**
  30 * XML Parser
  31 *
  32 * This framework is a wrapper for a robust XML parser.
  33 *
  34 * @author               Iris Studios, Inc.
  35 * @copyright    Copyright ©2002 - [#]year[#], Iris Studios, Inc.
  36 * @version              $Revision$
  37 * @package              ISSO
  38 *
  39 */
  40 class XML
  41 {
  42         /**
  43         * Framework registry object
  44         * @var  object
  45         */
  46         var $registry = null;
  47
  48         /**
  49         * Parser resource
  50         * @var  integer
  51         */
  52         var $parser = null;
  53
  54         /**
  55         * An array of function names that are to be executed for each tag name (name => function)
  56         * @var  array()
  57         */
  58         var $taghandler = array();
  59
  60         /**
  61         * Current CDATA value
  62         * @var  string
  63         */
  64         var $cdata = '';
  65
  66         /**
  67         * Tag stack of all open nodes
  68         * @var  array
  69         */
  70         var $stack = array();
  71
  72         /**
  73         * Node list for all open tag attributes
  74         * @var  array
  75         */
  76         var $attribs = array();
  77
  78         /**
  79         * Resulting parsed array
  80         * @var  array
  81         */
  82         var $result = array();
  83
  84         /**
  85         * Constructor
  86         */
  87         function __construct(&$registry)
  88         {
  89                 $this->registry =& $registry;
  90         }
  91
  92         /**
  93         * (PHP 4) Constructor
  94         */
  95         function XML(&$registry)
  96         {
  97                 $this->__construct($registry);
  98         }
  99
 100         /**
 101         * Parse an XML file
 102         *
 103         * @param        string  XML file data
 104         *
 105         * @return       array   Array with all the XML data parsed
 106         */
 107         function parse($data)
 108         {
 109                 $this->stack = array();
 110                 $this->attribs = array();
 111                 $this->result = array();
 112                 $this->cdata = '';
 113
 114                 // create a new parser
 115                 $this->parser = xml_parser_create();
 116                 xml_set_object($this->parser, $this);
 117                 xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, 0);
 118                 xml_set_element_handler($this->parser, 'handle_tag_start', 'handle_tag_end');
 119                 xml_set_character_data_handler($this->parser, 'handle_cdata');
 120
 121                 $this->attach_node($this->result);
 122
 123                 // parse the data and check for errors
 124                 if (!xml_parse($this->parser, $data))
 125                 {
 126                         $error['code'] = xml_get_error_code($this->parser);
 127                         $error['string'] = xml_error_string($error['code']);
 128                         $error['line'] = xml_get_current_line_number($this->parser);
 129                         $error['column'] = xml_get_current_column_number($this->parser);
 130                         trigger_error("XML Error: $error[string] at line $error[line] colunn $error[column]", E_USER_ERROR);
 131                         exit;
 132                 }
 133
 134                 // destroy the parser
 135                 xml_parser_free($this->parser);
 136
 137                 // done... send the results back
 138                 return $this->result;
 139         }
 140
 141         /**
 142         * Process the opening location of an XML tag
 143         *
 144         * @param        integer XML parser
 145         * @param        string  Tag name
 146         * @param        array   Tag attributes
 147         */
 148         function handle_tag_start(&$parser, $name, $attrs)
 149         {
 150                 // trim attributes
 151                 array_walk($attrs, 'trim');
 152
 153                 // existing node set
 154                 if (isset($this->attribs["$name"]))
 155                 {
 156                         // node set has < 1 child nodes
 157                         if (!isset($this->attribs["$name"][0]))
 158                         {
 159                                 $tmp = $this->attribs["$name"];
 160                                 unset($this->attribs["$name"]);
 161                                 $this->attribs["$name"][0] = $tmp;
 162                         }
 163
 164                         // create a new child node
 165                         $this->attach_node($this->attribs["$name"][] = (array)$attrs);
 166                 }
 167                 // node set doesn't exist, so create it
 168                 else
 169                 {
 170                         $this->attach_node($this->attribs["$name"] = (array)$attrs);
 171                 }
 172         }
 173
 174         /**
 175         * Process XML CDATA
 176         *
 177         * @param        integer XML parser
 178         * @param        string  CDATA from tag
 179         */
 180         function handle_cdata(&$parser, $data)
 181         {
 182                 $this->cdata .= $data;
 183         }
 184
 185         /**
 186         * Process the closing of an XML tag
 187         *
 188         * @param        integer XML parser
 189         * @param        string  Tag name
 190         */
 191         function handle_tag_end(&$parser, $name)
 192         {
 193                 // attach data to the node
 194                 if (($this->cdata = trim($this->cdata)) != '')
 195                 {
 196                         // if we have a data handler, operate it now
 197                         if (isset($this->taghandler["$name"]))
 198                         {
 199                                 $this->registry->debug("handler: " . $this->taghandler["$name"]);
 200                                 if (function_exists($this->taghandler["$name"]))
 201                                 {
 202                                         $this->cdata = $this->taghandler["$name"]($this->cdata, $this);
 203                                 }
 204                                 else
 205                                 {
 206                                         trigger_error('Could not find the function [' . $this->taghandler["$name"] . '()] for the XML tag "' . $name . '"', E_USER_ERROR);
 207                                 }
 208                         }
 209
 210                         $this->attribs['value'] = $this->cdata;
 211                 }
 212
 213                 $this->cdata = '';
 214
 215                 // remove the node
 216                 $this->detach_node();
 217         }
 218
 219         /**
 220         * Shifts the node tree
 221         *
 222         * @param        array   Node to place into the stack
 223         */
 224         function attach_node(&$node)
 225         {
 226                 // create a new node
 227                 $this->stack[ count($this->stack) ] =& $node;
 228
 229                 // new attributes to work with
 230                 $this->attribs =& $node;
 231         }
 232
 233         /**
 234         * Unshifts the node tree
 235         */
 236         function detach_node()
 237         {
 238                 // drop the newest node
 239                 unset($this->stack[ count($this->stack) - 1 ]);
 240
 241                 // assign the attributes to the next newest node
 242                 $this->attribs =& $this->stack[ count($this->stack) - 1 ];
 243         }
 244 }
 245
 246 /*=====================================================================*\
 247 || ###################################################################
 248 || # $HeadURL$
 249 || # $Id$
 250 || ###################################################################
 251 \*=====================================================================*/
 252 ?>