The xml_parser_create_ns() function is an inbuilt function in PHP which is used to create an XML parser with namespace support and returns the resource handle.

Syntax: 

resource xml_parser_create_ns( string $encoding, string $separator )

Parameters: This function accepts two parameters as mentioned above and described below:  

• $encoding: It is optional parameter. It specifies character encoding 
  
  • for input/output in PHP 4
  • only for output from PHP 5
  • for 5.0.0 and 5.0.1 default output charset is ISO-8859-1
  • from 5.0.2 default output charset is UTF-8
• $separator: It is optional parameter. It specifies the output separator for tag name and namespace. Its default value is " : ".

Return Value:  

• On Success: It returns a resource handle which is to be used by some other XML functions.
• On Failure: It returns FALSE. 

Note:  

• This function is available for PHP 4.0.5 and newer version.
• These examples may not work on online IDE. So, try to run it on local server or php hosted servers.

Below programs illustrate the xml_parser_create_ns() function in PHP:

Program 1:  

<?php

// Create an XML parser with
// namespace support
$parser = xml_parser_create_ns();

// Free the xml parser
xml_parser_free($parser);

?>

Output: 

(no output)

Program 2:  

<?php

// Creating an XML parser
// with namespace support
$parser = xml_parser_create_ns();

// Free the xml parser
$res = xml_parser_free($parser);

// Check parser is created or not
if(!$parser) {
    echo "error occurred!";
}else {
    echo "parser with namespace support has successfully been created";
}
?>

Output: 

parser with namespace support has successfully been created

Reference: https://www.php.net/manual/en/function.xml-parser-create-ns.php