PHP xml_set_element_handler() function

Author：Eve Cole Update Time：2024-12-29 11:12:01

Definition and usage

The xml_set_element_handler() function specifies the function to be called at the beginning and end of elements in an XML document.

If successful, the function returns TRUE. If it fails, returns FALSE.

grammar

 xml_set_element_handler(parser,start,end)

parameter	describe
parser	Required. Specifies the XML parser to use.
start	Required. Specifies a function to be called at the beginning of an element.
end	Required. Specifies the function to be called at the end of the element.

The function specified by the "start" parameter must have three parameters:

parameter	describe
parser	Required. Specifies a variable containing the XML parser that calls the processor.
name	Required. Specifies a variable containing the name (as a string) of the element in the XML file that triggers this function.
data	Required. Specifies an array containing element attributes (as strings) in the XML file.

The function specified by the "end" parameter must have two parameters:

parameter	describe
parser	Required. Specifies a variable containing the XML parser that calls the processor.
name	Required. Specifies a variable containing the name (as a string) of the element in the XML file that triggers this function.

Tips and Notes

Note: The start and end parameters can be an array containing object references and method names.

Example

 <?php$parser=xml_parser_create();function start($parser,$element_name,$element_attrs) { switch($element_name) { case "NOTE": echo "-- Note --<br />"; break; case "TO": echo "To: "; break; case "FROM": echo "From: "; break; case "HEADING": echo "Heading: "; break; case "BODY": echo "Message: "; } }function stop($parser,$element_name) { echo "<br />"; }function char($parser,$data) { echo $data; }xml_set_element_handler($parser,"start" ,"stop");xml_set_character_data_handler($parser,"char");$fp=fopen("test.xml","r");while ($data=fread($fp,4096)) { xml_parse($parser,$data,feof($fp)) or die (sprintf("XML Error: %s at line %d", xml_error_string(xml_get_error_code($parser )), xml_get_current_line_number($parser))); }xml_parser_free($parser);?>

The output of the above code looks like this:

 -- Note --To: ToveFrom: JaniHeading: ReminderMessage: Don't forget me this weekend!