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PHP implements parsing xml files using expat method

王林

Dec 31, 2019 pm 05:25 PM

phpxml fileparse

PHP implements parsing xml files using expat method

The example in this article describes the operation of php using expat mode to parse xml files. Share it with everyone for your reference, the details are as follows:

test.xml:

<?xml version="1.0" encoding="UTF-8"?>
<notes>
 <note>
 <to>George</to>
 <from>John</from>
 <heading>Reminder</heading>
 <body>Don&#39;t forget the meeting!</body>
 </note>
 <note>
 <to>George2</to>
 <from>John2</from>
 <heading>Reminder2</heading>
 <body>Don&#39;t forget the meeting!2</body>
 </note>
 <instances>
 <instance st="192.168.234.121" />
 <instance st="192.168.234.28" />
 </instances>
</notes>

PHP file: (Free learning video tutorial sharing: php video tutorial)

<?php
// Initialize the XML parser
$parser = xml_parser_create();
// Function to use at the start of an element
function start($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 to use at the end of an element
function stop($parser, $element_name)
{
  echo "<br />";
}
// Function to use when finding character data
function char($parser, $data)
{
  echo $data;
}
// Specify element handler
xml_set_element_handler($parser, "start", "stop");
// Specify data handler
xml_set_character_data_handler($parser, "char");
// Open XML file
// $fp = fopen("test.xml", "r");
// Read data
// while ($data = fread($fp, 10)) {
// xml_parse($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)));
// }
// fclose($fp);
$data = file_get_contents("test.xml");
xml_parse($parser, $data) or die(sprintf("XML Error: %s at line %d", xml_error_string(xml_get_error_code($parser)), 
xml_get_current_line_number($parser)));
// Free the XML parser
xml_parser_free($parser);
?>

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