Recently, I am working on a small program for parsing XML. Because the server is PHP4, XML parsing functions can only be parsed using xml_parser In the SAX method.
Recently, I am working on a small program for parsing XML. Because the server is PHP4, XML parsing functions can only be parsed using xml_parser In the SAX method.
The Code is as follows:
$ G_books = array ();
$ G_elem = null;
Function startElement ($ parser, $ name, $ attrs)
{
Global $ g_books, $ g_elem;
If ($ name = 'book') $ g_books [] = array ();
$ G_elem = $ name;
}
Function endElement ($ parser, $ name)
{
Global $ g_elem;
$ G_elem = null;
}
Function textData ($ parser, $ text)
{
Global $ g_books, $ g_elem;
If ($ g_elem = 'author' |
$ G_elem = 'her her '|
$ G_elem = 'title ')
{
$ G_books [count ($ g_books)-1] [$ g_elem] = $ text;
}
}
$ Parser = xml_parser_create ();
Xml_set_element_handler ($ parser, "startElement", "endElement ");
Xml_set_character_data_handler ($ parser, "textData ");
$ F = fopen ('books. xml', 'R ');
While ($ data = fread ($ f, 4096 ))
{
Xml_parse ($ parser, $ data );
}
Xml_parser_free ($ parser );
Foreach ($ g_books as $ book)
{
Echo $ book ['title']. "-". $ book ['author']. "-";
Echo $ book ['her her ']. "\ n ";
}
?>
Problems found in XML parsing using the SAX method in PHP
XML is as follows:
So. xml
The Code is as follows:
1047869
2008-08-28 14:54:51
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... (Omitted rows)
Xml_class.php
The Code is as follows:
Class xml {
Var $ parser;
Var $ I = 0;
Var $ search_result = array ();
Var $ row = array ();
Var $ data = array ();
Var $ now_tag;
Var $ tags = array ("ID", "CLASSID", "SUBCLASSID", "CLASSNAME", "TITLE", "author title", "AUTHOR", "PRODUCER ", "SUMMARY", "CONTENT", "DATE ");
Function xml ()
{
$ This-> parser = xml_parser_create ();
Xml_set_object ($ this-> parser, $ this );
Xml_set_element_handler ($ this-> parser, "tag_open", "tag_close ");
Xml_set_character_data_handler ($ this-> parser, "cdata ");
}
Function parse ($ data)
{
Xml_parse ($ this-> parser, $ data );
}
Function tag_open ($ parser, $ tag, $ attributes)
{
$ This-> now_tag = $ tag;
If ($ tag = 'result '){
$ This-> search_result = $ attributes;
}
If ($ tag = 'row '){
$ This-> row [$ this-> I] = $ attributes;
}
}
Function cdata ($ parser, $ cdata)
{
If (in_array ($ this-> now_tag, $ this-> tags )){
$ Tagname = strtolower ($ this-> now_tag );
$ This-> data [$ this-> I] [$ tagname] = $ cdata;
}
}
Function tag_close ($ parser, $ tag)
{
$ This-> now_tag = "";
If ($ tag = 'row '){
$ This-> I ++;
}
}
}
?>
Search. php
The Code is as follows:
Require_once ("./xml_class.php ");
$ Xml = file_get_contents ("./so. xml ");
$ Xml_parser = new xml ();
$ Xml_parser-> parse ($ xml );
Print_r ($ xml_parser );
?>
In the final result, the data in the summary is much less, and the complete summary content is not always obtained. Sometimes garbled characters are returned, and I don't know what the problem is.
The problem was discovered later because xml_parser parses XML to process data in nodes cyclically. Each time, it takes about 300 characters in length (I am not sure about the specific length, it is only about 300 Output Using strlen), so it is known that the previous data is overwritten in each loop, so that the data is incomplete.
The solution is to set $ this-> data [$ this-> I] [$ tagname] = $ cdata IN THE cdata method of the xml class in the xml_class file; change to $ this-> data [$ this-> I] [$ tagname]. = $ cdata; (some of the NOTICE errors are ignored by PHP ).
