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<?php

// +-----------------------------------------------------------------------+

// | PhpWebGallery - a PHP based picture gallery                           |

// | Copyright (C) 2002-2003 Pierrick LE GALL - pierrick@phpwebgallery.net |

// | Copyright (C) 2003-2005 PhpWebGallery Team - http://phpwebgallery.net |

// +-----------------------------------------------------------------------+

// | branch        : BSF (Best So Far)

// | file          : $RCSfile: functions_xml.inc.php,v $

// | last update   : $Date: 2005/01/07 23:10:51 $

// | last modifier : $Author: plg $

// | revision      : $Revision: 1.11 $

// +-----------------------------------------------------------------------+

// | 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                                          |

// |                                                                       |

// | This program is distributed in the hope that it will be useful, but   |

// | WITHOUT ANY WARRANTY; without even the implied warranty of            |

// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      |

// | General Public License for more details.                              |

// |                                                                       |

// | You should have received a copy of the GNU General Public License     |

// | along with this program; if not, write to the Free Software           |

// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |

// | USA.                                                                  |

// +-----------------------------------------------------------------------+

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

  $content = preg_replace( '/<\/[^>]+>$/', '', $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 )

{

//  echo htmlentities($element).'<br /><br />';

  $regex = '/^<\w+[^>]*'.$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;

  }

  $xml_content = '';

  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;

}

?>