A very handy XML class! ! Original_PHP Tutorial

// I am not familiar with XML, and the description of XML may be wrong in the annotation
// This is just an idea. To be implemented, it should be slightly modified. Some data that are not commonly queried using XML can be used. Save
// For example, user information in a virtual community will generally be displayed only if the user himself or another user specifies his USERNAME
// The rest requires opening, querying, interpreting data sets, and closing the database every time consumption.

define("enter",chr(13).chr(10));
class DATA_XML //Key! ! ! A custom class
{
var $parser; //XML interpreter
var $tags; //XML tags
var $on; //
var $root; // root Element
var $Data = array(); // Element array

function DATA_XML($filename,$root) //Class initial function filename file name, root root element
{
$this->root = $root; //Initial root element
$this->parser = xml_parser_create();//Create interpretation object
xml_set_object(&$this->parser,&$this );//Set object
xml_set_element_handler($this->parser,"tag_on","tag_off");//Set element management function
xml_set_character_data_handler($this->parser,"getdata"); //Set data management events
xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, 0); //Requires strict case sensitivity

if( file_exists($filename) ) //File found?
{//Find
$fp = fopen($filename,"r"); //Open for read only
$c = fread($fp,filesize($filename)); //Read data
fclose($fp);//Close
$this->parse($c); //Set the interpretation object
}
else
{
echo "ooooo "; //! ? ! It seems to be used for debugging, just remove the else
}


}

function parse($data)//Explanation function
{
xml_parse ($this->parser,$data);
}

function tag_on($parser,$tag,$attributes)//Discover element trigger function
{
$this- >on = true; // Already triggered
$this->tags = $tag;
//echo $tag;
}

function tag_off($parser,$ tag) //Element binding function
{
$this->on = false; // Element binding
}

function getdata($parser,$cdata) // Take out the element
{
if($this->on && $this->tags!=$this->root)
{//It is better to verify, (whether it is an element now starting, and not the root element? )

$this->Data[$this->tags]=trim($cdata);
                                                ! Use tags to make an array table and add data to the array elements
//echo trim($cdata);
//echo $this->tags;
//echo "n";
}
}
function check($str)
{//Check character
if( strlen($str)<1)//If it is a null character
return ' ' ;//Return ' '
else
return $str;//Otherwise return to the original path (otherwise the XML will not seem to have an end tag)
}
function saveas($filename)//Save as For
{
$c=''.enter; ",chr(13).chr(10));
$c.="<".$this->root.">".enter;
for( reset($this->Data);$i=key($this->Data);next($this->Data))
{//Start to list all the data
$c.= "<".$i.">".$this->check($this->Data[$i])."// Use the array table name as the element label and add the data content
}
//echo $c;
$c.="root.">".enter;//End tag
$fp = fopen( $filename , "w" );//Write file
fwrite($fp,$c);
fclose($fp);

}
};




/*New key an XML file
                                                      DATA_XML(path."arm.xml","DATA"/*root element*/);
$xml->Data["UserName"]="Guan Yu";
    $xml->Data[ "Nick"]="Guan Yunchang";
$xml->saveas(path."arm.xml");
unset( $xml );
// Read a file
$ xml = new DATA_XML(path."arm.xml","DATA");
                      echo $xml->Data["Nick"];//Show it?
$xml->Data["Nick"]="Master Guan";//UPDATE
$xml->Data["Master"]="Liu Bei";//INSERT INTO
$ 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. The description of XML may be wrong. // This is just an idea. If implemented, it should be slightly modified, and some data queried by uncommon conditions can be saved in XML //...