source: trunk/include/functions_xml.inc.php @ 13

<?php
/***************************************************************************
 *                           functions_xml.inc.php                         *
 *                            -------------------                          *
 *   application          : PhpWebGallery 1.3                              *
 *   author               : Pierrick LE GALL <pierrick@z0rglub.com>        *
 *                                                                         *
 ***************************************************************************

 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation;                                         *
 *                                                                         *
 ***************************************************************************/

//------------------------------------------------------------------ constantes
define( ATT_REG, '\w+' );
define( VAL_REG, '[^"]*' );

//------------------------------------------------------------------- functions
// getContent returns the content of a tag
//
// example : getContent( "<name>Joe</name>" ) returns "Joe"
//
// It also works with strings containing themself sub-tags :
// <perso><name>Jean</name><firstname>Billie</fisrtname></perso> ->
// <name>Jean</name><firstname>Billie</firstname>
function getContent( $element )
{
  // deleting start of the tag
  $content = preg_replace( '/^<[^>]+>/', '', $element );
  // deleting end of the tag
  $content = preg_replace( '/<\/\w+>$/', '', $content );
  // replacing multiple instance of space character
  $content = preg_replace( '/\s+/', ' ', $content );

  return $content;
}

// The function get Attribute returns the value corresponding to the attribute
// $attribute for the tag $element.
function getAttribute( $element, $attribute )
{
  $regex = '/^<\w+[^>]*'.$attribute.'\s*=\s*"('.VAL_REG.')"/i';
  if ( preg_match( $regex, $element, $out ) ) return $out[1];
  else return '';
}

function deprecated_getAttribute( $element, $attribute )
{
  // Retrieving string with tag name and all attributes
  $regex = '/^<\w+( '.ATT_REG.'="'.VAL_REG.'")*/';
  preg_match( $regex, $element, $out );

  // Splitting string for retrieving separately attributes
  // and corresponding values
  $regex = '/('.ATT_REG.')="('.VAL_REG.')"/';
  preg_match_all( $regex, $out[0], $out );

  // Searching and returning the value of the requested attribute
  for ( $i = 0; $i < sizeof( $out[0] ); $i++ )
  {
    if ( $out[1][$i] == $attribute )
    {
      return $out[2][$i];
    }
  }
  return '';
}
        
// The function getChild returns the first child
// exemple : getChild( "<table><tr>XXX</tr><tr>YYY</tr></table>", "tr" )
//           returns "<tr>XXX</tr>"
function getChild( $document, $node )
{
  $regex = '/<'.$node.'(\s+'.ATT_REG.'="'.VAL_REG.'")*';
  $regex.= '(\s*\/>|>.*<\/'.$node.'>)/U';

  preg_match( $regex, $document, $out );
  return $out[0];
}

// getChildren returns a list of the children identified by the $node
// example : 
//     getChild( "<table><tr>XXX</tr><tr>YYY</tr></table>", "tr" )
//     returns an array with :
//          $array[0] equals "<tr>XXX</tr>"
//          $array[1] equals "<tr>YYY</tr>"
function getChildren( $document, $node )
{
  $regex = '/<'.$node.'(\s+'.ATT_REG.'="'.VAL_REG.'")*';
  $regex.= '(\s*\/>|>.*<\/'.$node.'>)/U';

  preg_match_all( $regex, $document, $out );
  return $out[0];
}
        
// get_CodeXML places the content of a text file in a PHP variable and
// return it. If the file can't be opened, returns false.
function getXmlCode( $filename )
{
  $file = fopen( $filename, 'r' );
  if ( !$file )
  {
    return false;
  }
  while ( !feof( $file ) )
  {
    $xml_content .= fgets( $file, 1024 );
  }
  fclose( $file );
  $xml_content = str_replace( "\n", '', $xml_content );
  $xml_content = str_replace( "\t", '', $xml_content );

  return $xml_content;
}
?>