A very convenient XML class !! Original Oh .? I am not familiar with XML, and may have incorrect description of XML. this is just an idea. to implement this, I should slightly trim it. I can save some data that is not frequently used in condition query using XML. // I am not familiar with XML, and the description of XML may be incorrect.
// This is just an idea. to implement it, you should slightly trim it. you can save data that is not frequently used in condition queries in XML.
// For example, user information in a virtual community is displayed only when the user himself or another user specifies his or her USERNAME.
// The remaining consumption of enabling, querying, interpreting datasets, and disabling databases each time.
Define ("enter", chr (13). chr (10 ));
Class DATA_XML // key !!! A custom class
{
Var $ parser; // XML interpreter
Var $ tags; // XML tag
Var $ on ;//
Var $ root; // root element
Var $ Data = array (); // array of elements
Function DATA_XML ($ filename, $ root) // class initial function filename file name, root element
{
$ This-> root = $ root; // initial root element
$ This-> parser = xml_parser_create (); // creates an interpreted object
Xml_set_object (& $ this-> parser, & $ this); // sets the object
Xml_set_element_handler ($ this-> parser, "tag_on", "tag_off"); // sets the element management function
Xml_set_character_data_handler ($ this-> parser, "getdata"); // Sets data management events
Xml_parser_set_option ($ this-> parser, XML_OPTION_CASE_FOLDING, 0); // case sensitive
If (file_exists ($ filename) // find the file?
{// Find
$ Fp = fopen ($ filename, "r"); // read-only open
$ C = fread ($ fp, filesize ($ filename); // read data
Fclose ($ fp); // Close
$ This-> parse ($ c); // sets the explanatory object
}
Else
{
Echo "ooooo ";//!?! It seems to be used for debugging. it's better to remove else.
}
}
Function parse ($ data) // explains the function
{
Xml_parse ($ this-> parser, $ data );
}
Function tag_on ($ parser, $ tag, $ attributes) // trigger a function by a discovery element
{
$ This-> on = true; // triggered
$ This-> tags = $ tag;
// Echo $ tag;
}
Function tag_off ($ parser, $ tag) // element termination function
{
$ This-> on = false; // element Terminator
}
Function getdata ($ parser, $ cdata) // Retrieve the element
{
If ($ this-> on & $ this-> tags! = $ This-> root)
{// Verify the result. (is it the beginning of the element and not the root element ?)
$ This-> Data [$ this-> tags] = trim ($ cdata );
// Key !! Use tags as an array table and add data to this array element.
// Echo trim ($ cdata );
// Echo $ this-> tags;
// Echo "\ n ";
}
}
Function check ($ str)
{// Check characters
If (strlen ($ str) <1) // if it is a null character
Return ''; // return''
Else
Return $ str; // otherwise, the original path is returned (otherwise, XML does not seem to end with the mark)
}
Function saveas ($ filename) // Save
{
$ C =' '. Enter;
// Needless to say, enter is define ("enter", chr (13). chr (10 ));
$ C. = "<". $ this-> root. ">". enter;
// First set the root element
For (reset ($ this-> Data); $ I = key ($ this-> Data); next ($ this-> Data ))
{// Start to list all the data
$ C. = "<". $ I. ">". $ this-> check ($ this-> Data [$ I])." ". Enter;
// Use the array table name as an element label and add data content
}
// Echo $ c;
$ C. =" Root. ">". enter; // end tag
$ Fp = fopen ($ filename, "w"); // write a file
Fwrite ($ fp, $ c );
Fclose ($ fp );
}
};
/* New Key: an XML file
$ Xml = new DATA_XML (path. "arm. xml", "DATA"/* Root element */);
$ Xml-> Data ["UserName"] = "Guan Yu ";
$ Xml-> Data ["Nick"] = "";
$ Xml-> saveas (path. "arm. xml ");
Unset ($ xml );
// Read an object
$ Xml = new DATA_XML (path. "arm. xml", "DATA ");
Echo $ xml-> Data ["Nick"]; // display it?
$ Xml-> Data ["Nick"] = ""; // UPDATE
$ Xml-> Data ["Master"] = "Liu Bei"; // INSERT
$ Xml-> saveas (path. "arm. xml"); // Save as overwrite itself
*/
?>
Http://www.bkjia.com/PHPjc/313924.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/313924.htmlTechArticle? // I am not familiar with XML, and the description of XML may be incorrect. // This is just an idea. to implement it, we should slightly trim it, you can save some data that is not frequently used for condition query in XML //...
