How to use php to dynamically generate xml files and extract data from xml files into html

Use php to dynamically generate xml files and extract data from xml files into html. This stuff took me a day... However, at the end, I found that I could not achieve the effect I imagined... It's a pity... It seems that PHP still needs to strengthen XML... If

This stuff took me a day... However, at the end, I found that I could not achieve the effect I imagined... It's a pity... It seems that PHP still needs to strengthen XML... If anyone has research on this. Thank you for writing to us...

Create a table first:
Create table books (
Bookid int (4) not null auto_increment,
Bookname varchar (100) not null,
Bookauth varchar (50) not null,
Bookpublisher varchar (50) not null,
Bookpubdate datetime not null,
Bookurl varchar (50) not null,
KEY bookid (bookid ),
);

Then... This section is the source code for converting data from MYSQL to XML:
$ Connect_id = mysql_connect ("localhost", "root ","");
Mysql_select_db ("bbs", $ connect_id );
$ Query = "select * from books order by bookid ";
$ Rs = mysql_query ($ query, $ connect_id );
$ Numfields = mysql_num_fields ($ rs );
$ XMLfile =" N ";
$ XMLfile. =" N ";

While ($ row = mysql_fetch_array ($ rs )){
For ($ I = 0; $ I <$ numfields; $ I ){
$ Fieldname = mysql_field_name ($ rs, $ I );
$ XMLfile. = "<". $ fieldname. ">". $ row [$ I]." N ";
}
}
Mysql_free_result ($ rs );
Mysql_close ($ connect_id );
$ XMLfile. ="N ";
$ Fp = fopen ("XMLdoc/XMLdoc. XML", "w ");
If (fwrite ($ fp, $ XMLfile )){
Echo "file written! ";
}
Else {
Echo "failed to write file! ";
}
?>

This section is the source code for converting data from XML into HTML...
Class XML {
Var $ parser;

Function XML (){
$ This-> parser = XML_parser_create ();
XML_set_object ($ this-> parser, & $ this );
XML_set_element_handler ($ this-> parser, "tag_on", "tag_off ");
XML_set_character_data_handler ($ this-> parser, "cdata ");
}

Function parse ($ data ){
XML_parse ($ this-> parser, $ data );
}

Function tag_on ($ parser, $ tag, $ attributes ){
If (XML_get_current_line_number ($ parser) = 2 ){
Echo"". $ Tag ."";
}
Else {
Switch (XML_get_current_line_number ($ parser)-2) % 6 ){
Case 0:
Echo"Download";
Break;
Case 1:
Echo"ID number";
Break;
Case 2:
Echo"Title";
Break;
Case 3:
Echo"Author";
Break;
Case 4:
Echo"Press";
Break;
Case 5:
Echo"Publication date";
Break;
}
}
}

Function cdata ($ parser, $ cdata ){
Echo $ cdata;
}

Function tag_off ($ parser, $ tag ){
Echo "n ";
}
}

$ XML_parser = new XML ();
$ XMLfilename = "XMLdoc/XMLdoc. XML ";
$ Fp = fopen ($ XMLfilename, "r ");
$ XMLdata = fread ($ fp, filesize ($ XMLfilename ));
?>
Book Information

$ XML_parser-> parse ($ XMLdata );?>

Actually, you can see that .. This example is a failure... Because it is not very effective .. You cannot get what you want... Alas... Bitter ....

Bytes... However, at the end, I found that I could not achieve the effect I imagined... It's a pity... It seems that PHP still needs to strengthen XML... If any...