The xml_set_character_data_handler() function is an inbuilt function in PHP which is used to set the character data handler function for XML parser.
Syntax:
bool xml_set_character_data_handler( resource $xml_parser, callable $data_handler )
Parameters: This function accepts two parameters as mentioned above and described below:
- $xml_parser: It is required parameter. It holds the reference of XML parser to set up character data handler.
- $data_handler: It is required parameter. It is a string which contains the name of function.
handler( resource $parser, string $data )
The handler function must have these two parameters:
- $xml_parser: It holds the reference of XML parser which is calling to handler.
- $data: It holds the character data as a string.
Return Value: This function returns True on success or False on failure.
Note:
- This function is available for PHP 4.0.0 and newer version.
- These examples may not work on online IDE. So, try to run it on local server or php hosted servers.
gfg.xml file:
XML
<? xml version = "1.0" encoding = "utf-8" ?>
< user >
< username > user123 </ username >
< name > firstname lastname </ name >
< phone > +91-9876543210 </ phone >
< detail > I am John Doe. Live in Kolkata, India. </ detail >
</ user >
|
Program 1:
PHP
<?php // Create an XML parser $xml_parser = xml_parser_create();
// Set the character handler function for XML parser xml_set_character_data_handler( $xml_parser , "char_print" );
// Opening xml file $file_pointer = fopen ( "gfg.xml" , "r" );
// Reading xml data from file while ( $data = fread ( $file_pointer , 4096)) {
// Parsing XML data
xml_parse( $xml_parser , $data , feof ( $file_pointer )) or
// Display error when parsing error occurs
die (sprintf( "XML Error: %s at line %d" ,
// Error string
xml_error_string(xml_get_error_code( $xml_parser )),
// Current line
xml_get_current_line_number( $xml_parser )));
} // Free to xml parser xml_parser_free( $xml_parser );
fclose( $file_pointer );
// Character handler function for XML parser function char_print( $xml_parser , $data_to_print ) {
echo $data_to_print ;
} ?> |
Output:
user123 firstname lastname +91-9876543210 I am John Doe. Live in Kolkata, India.
Program 2:
PHP
<?php // Create an xml parser $xml_parser = xml_parser_create();
// Element handler function named "starting_handler" // enables custom manipulation for output function starting_handler( $xml_parser ,
$element_name , $element_attrs ) {
switch ( $element_name ) {
case "USER" :
echo "<u>USER DATA</u><br>" ;
break ;
case "USERNAME" :
echo "Username: " ;
break ;
case "NAME" :
echo "Name: " ;
break ;
case "PHONE" :
echo "Phone no: " ;
break ;
case "DETAIL" :
echo "More about user: " ;
}
} // Element handler function named "ending_handler" function ending_handler( $xml_parser , $element_name ) {
echo "<br>" ;
} // Character handler function named "char_handler" function char_handler( $xml_parser , $data ) {
echo $data ;
} // Setting element handlers xml_set_element_handler( $xml_parser ,
"starting_handler" , "ending_handler" );
// Setting character data handler xml_set_character_data_handler( $xml_parser , "char_handler" );
// Opening xml file $file_pointer = fopen ( "gfg.xml" , "r" );
// Reading xml file while ( $data = fread ( $file_pointer , 4096)) {
xml_parse( $xml_parser , $data , feof ( $file_pointer )) or
// Display error while xml parsing
die (sprintf( "XML Error: %s at line %d" ,
// Error string
xml_error_string(xml_get_error_code( $xml_parser )),
// Error line number
xml_get_current_line_number( $xml_parser )));
} // Free to xml parser xml_parser_free( $xml_parser );
// Closing file stream fclose( $file_pointer );
?> |
Output:
USER DATA Username: user123 Name: firstname lastname Phone no: +91-9876543210 More about user: I am John Doe. Live in Kolkata, India.
Reference: https://www.php.net/manual/en/function.xml-set-character-data-handler.php