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  */
   6
   7 /**
   8  * the base class for an element
   9  */
  10 class element {
  11   var $name = '';
  12   var $attrs = array();
  13   var $children = array();
  14
  15   function myPrint() {
  16     echo '<UL>';
  17     echo "<LI> <B> Name: </B> $this->name";
  18     // print attributes
  19     echo '<LI> <B> Attributes: </B>';
  20     foreach ($this->attrs as $name => $value) {
  21       echo "$name => $value; " ;
  22     }
  23     // print children
  24     foreach ($this->children as $child) {
  25        if ( is_string($child) ) {
  26          echo '<LI> '.$child;
  27        } else {
  28          $child->myPrint();
  29        }
  30     }
  31     echo '</UL>';
  32   }
  33
  34 }
  35
  36 $ancStack = array();    // the stack with ancestral elements
  37
  38 // Three global functions needed for parsing, sorry guys
  39 function wgXMLstartElement($parser, $name, $attrs) {
  40    global $ancStack, $rootElem;
  41
  42    $newElem = new element;
  43    $newElem->name = $name;
  44    $newElem->attrs = $attrs;
  45    array_push($ancStack, $newElem);
  46    // add to parent if parent exists
  47    $nrAncs = count($ancStack)-1;
  48    if ( $nrAncs > 0 ) {
  49      array_push($ancStack[$nrAncs-1]->children, &$ancStack[$nrAncs]);
  50    } else {
  51      // make extra copy of root element and alias it with the original
  52      array_push($ancStack, &$ancStack[0]);
  53    }
  54 }
  55
  56 function wgXMLendElement($parser, $name) {
  57   global $ancStack, $rootElem;
  58
  59   // pop element of stack
  60   array_pop($ancStack);
  61 }
  62
  63 function wgXMLcharacterData($parser, $data) {
  64   global $ancStack, $rootElem;
  65
  66   $data = trim ( $data ) ; // Don't add blank lines, they're no use...
  67
  68   // add to parent if parent exists
  69   if ( $ancStack && $data != "" ) {
  70     array_push($ancStack[count($ancStack)-1]->children, $data);
  71   }
  72 }
  73
  74
  75 /**
  76  * Here's the class that generates a nice tree
  77  * package parserxml
  78  */
  79 class xml2php {
  80
  81    function &scanFile( $filename ) {
  82        global $ancStack;
  83        $ancStack = array();
  84
  85        $xml_parser = xml_parser_create();
  86        xml_set_element_handler($xml_parser, 'wgXMLstartElement', 'wgXMLendElement');
  87        xml_set_character_data_handler($xml_parser, 'wgXMLcharacterData');
  88        if (!($fp = fopen($filename, 'r'))) {
  89           die('could not open XML input');
  90        }
  91        while ($data = fread($fp, 4096)) {
  92           if (!xml_parse($xml_parser, $data, feof($fp))) {
  93               die(sprintf("XML error: %s at line %d",
  94                   xml_error_string(xml_get_error_code($xml_parser)),
  95                   xml_get_current_line_number($xml_parser)));
  96           }
  97        }
  98        xml_parser_free($xml_parser);
  99
 100        // return the remaining root element we copied in the beginning
 101        return $ancStack[0];
 102    }
 103
 104 }
 105
 106 $w = new xml2php;
 107 $filename = 'sample.xml';
 108 $result = $w->scanFile( $filename );
 109 $result->myPrint();
 110
 111 return 0;
 112
 113 ?>