Pre-requisite: XML Basics
The xml_parser_free() function is an inbuilt function in PHP which is used to free the XML parser.
Syntax:
bool xml_parser_free( resource $parser )
Parameters: This function accepts single parameter $parser which is required. It specifies the reference of XML parser to free.
Return Value: This function returns True on success or False on failure.
Note:
- This function is available for PHP 4.0.0 and newer version.
- These examples may not work on online IDE. So, try to run it on local server or php hosted servers.
gfg.xml file:
XML
<?xml version="1.0" encoding="utf-8"?><user> <username>user123</username> <name>firstname lastname</name> <phone>+91-9876543210</phone> <detail>I am John Doe. Live in Kolkata, India.</detail></user> |
Program 1:
PHP
<?php// Create an XML parser$parser = xml_parser_create(); // Set the character handler function// for the XML parserxml_set_character_data_handler($parser, "char_print"); // Opening xml file$filePointer = fopen("gfg.xml", "r"); // Reading xml data from filewhile ($data = fread($filePointer, 4096)) { // Parsing XML data xml_parse($parser, $data, feof($filePointer)) or // Display error when parse error occurs die (sprintf("XML Error: %s at line %d", // Error string xml_error_string(xml_get_error_code($parser)), // Current line xml_get_current_line_number($parser)));} // Freeing xml parserxml_parser_free($parser); fclose($filePointer); // Character handler function for XML parserfunction char_print($parser, $data) { echo $data;} ?> |
Output:
user123 firstname lastname +91-9876543210 I am John Doe. Live in Kolkata, India.
Program 2:
PHP
<?php// Creating an xml parser$parser = xml_parser_create();// Element handler function named "starting_handler"// enables the custom manipulation for outputfunction starting_handler($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($parser, $element_name) { echo "<br>";}// Character handler function named "char_handler"function char_handler($parser, $data) { echo $data;}// Setting element handlersxml_set_element_handler($parser, "starting_handler", "ending_handler");// Setting character data handlerxml_set_character_data_handler($parser, "char_handler");// Opening xml file$filePointer = fopen("gfg.xml", "r");// Reading xml file while( $data = fread($filePointer, 4096) ) { xml_parse($parser, $data, feof($filePointer)) or // Display error while xml parsing die (sprintf("XML Error: %s at line %d", // Error string xml_error_string(xml_get_error_code($parser)), // Error line number xml_get_current_line_number($parser)));}// Free to xml parserxml_parser_free($parser);// Closing file streamfclose($filePointer);?> |
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-parser-free.php
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