includes/ParserXML.php

   1 <?
   2 /**
   3  * This should one day become the XML->(X)HTML parser
   4  * Based on work by Jan Hidders and Magnus Manske
   5  * @package MediaWiki
   6  */
   7
   8 /**
   9  * the base class for an element
  10  * @package MediaWiki
  11  */
  12 class element {
  13     var $name = '';
  14     var $attrs = array();
  15     var $children = array();
  16
  17     function myPrint() {
  18         $ret = "<ul>\n";
  19         $ret .= "<li> <b> Name: </b> $this->name </li>\n";
  20         // print attributes
  21         $ret .= '<li> <b> Attributes: </b>';
  22         foreach ($this->attrs as $name => $value) {
  23             $ret .= "$name => $value; " ;
  24         }
  25         $ret .= " </li>\n";
  26         // print children
  27         foreach ($this->children as $child) {
  28             if ( is_string($child) ) {
  29                 $ret .= "<li> $child </li>\n";
  30             } else {
  31                 $ret .= $child->myPrint();
  32             }
  33         }
  34         $ret .= "</ul>\n";
  35         return $ret;
  36     }
  37 }
  38
  39 $ancStack = array();    // the stack with ancestral elements
  40
  41 // Three global functions needed for parsing, sorry guys
  42 function wgXMLstartElement($parser, $name, $attrs) {
  43     global $ancStack;
  44
  45     $newElem = new element;
  46     $newElem->name = $name;
  47     $newElem->attrs = $attrs;
  48
  49     array_push($ancStack, $newElem);
  50 }
  51
  52 function wgXMLendElement($parser, $name) {
  53     global $ancStack, $rootElem;
  54     // pop element off stack
  55     $elem = array_pop ($ancStack);
  56     if (count ($ancStack) == 0)
  57         $rootElem = $elem;
  58     else
  59         // add it to its parent
  60         array_push ($ancStack[count($ancStack)-1]->children, $elem);
  61 }
  62
  63 function wgXMLcharacterData($parser, $data) {
  64     global $ancStack;
  65     $data = trim ($data); // Don't add blank lines, they're no use...
  66     // add to parent if parent exists
  67     if ( $ancStack && $data != "" ) {
  68         array_push ($ancStack[count($ancStack)-1]->children, $data);
  69     }
  70 }
  71
  72
  73 /**
  74  * Here's the class that generates a nice tree
  75  * package parserxml
  76  * @package MediaWiki
  77  */
  78 class xml2php {
  79
  80     function &scanFile( $filename ) {
  81         global $ancStack, $rootElem;
  82         $ancStack = array();
  83
  84         $xml_parser = xml_parser_create();
  85         xml_set_element_handler ($xml_parser, 'wgXMLstartElement', 'wgXMLendElement');
  86         xml_set_character_data_handler ($xml_parser, 'wgXMLcharacterData');
  87         if (!($fp = fopen($filename, 'r'))) {
  88             die('could not open XML input');
  89         }
  90         while ($data = fread($fp, 4096)) {
  91             if (!xml_parse($xml_parser, $data, feof($fp))) {
  92                 die(sprintf("XML error: %s at line %d",
  93                     xml_error_string(xml_get_error_code($xml_parser)),
  94                     xml_get_current_line_number($xml_parser)));
  95             }
  96         }
  97         xml_parser_free($xml_parser);
  98
  99         // return the remaining root element we copied in the beginning
 100         return $rootElem;
 101     }
 102
 103     function scanString ( $input ) {
 104         global $ancStack, $rootElem;
 105         $ancStack = array();
 106
 107         $xml_parser = xml_parser_create();
 108         xml_set_element_handler ($xml_parser, 'wgXMLstartElement', 'wgXMLendElement');
 109         xml_set_character_data_handler ($xml_parser, 'wgXMLcharacterData');
 110
 111         if (!xml_parse ($xml_parser, $input, true)) {
 112             die (sprintf ("XML error: %s at line %d",
 113                 xml_error_string(xml_get_error_code($xml_parser)),
 114                 xml_get_current_line_number($xml_parser)));
 115         }
 116         xml_parser_free ($xml_parser);
 117
 118         // return the remaining root element we copied in the beginning
 119         return $rootElem;
 120     }
 121
 122 }
 123
 124 /* Example code:
 125
 126     $w = new xml2php;
 127     $filename = 'sample.xml';
 128     $result = $w->scanFile( $filename );
 129     print $result->myPrint();
 130 */
 131
 132 ?>