Monday, 24 July 2017

PHP - Ajax XML Parser

       No comments

Ajax XML Example

Using with Ajax we can parser xml from local directory as well as servers, Below example demonstrate how to parser xml with web browser.

<html>
   <head>
   
      <script>
         function showCD(str) {
            if (str == "") {
               document.getElementById("txtHint").innerHTML = "";
               return;
            }
            
            if (window.XMLHttpRequest) {
               // code for IE7+, Firefox, Chrome, Opera, Safari
               xmlhttp = new XMLHttpRequest();
            }else {  
               // code for IE6, IE5
               xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
            }
            
            xmlhttp.onreadystatechange = function() {
               if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
                  document.getElementById("txtHint").innerHTML = xmlhttp.responseText;
               }
            }
            xmlhttp.open("GET","getcourse.php?q="+str,true);
            xmlhttp.send();
         }
      </script>
   
   </head>
   <body>
      
      <form>
         Select a Course:
         <select name = "cds" onchange = "showCD(this.value)">
            <option value = "">Select a course:</option>
            <option value = "Android">Android </option>
            <option value = "Html">HTML</option>
            <option value = "Java">Java</option>
            <option value = "Microsoft">MS technologies</option>
         </select>
      </form>
      
      <div id = "txtHint"><b>Course info will be listed here...</b></div>
      
   </body>
</html>

The above example will call getcourse.php using with GET method. getcourse.php file loads catalog.xml. getcourse.php is as shown below −

<?php
   $q = $_GET["q"];
   
   $xmlDoc = new DOMDocument();
   $xmlDoc->load("catalog.xml");
   
   $x = $xmlDoc->getElementsByTagName('COURSE');
   
   for ($i = 0; $i<=$x->length-1; $i++) {
      =
      if ($x->item($i)->nodeType == 1) {
         if ($x->item($i)->childNodes->item(0)->nodeValue == $q) {
            $y = ($x->item($i)->parentNode);
         }
      }
   }
 
   $cd = ($y->childNodes);
   
   for ($i = 0;$i<$cd->length;$i++) {
      if ($cd->item($i)->nodeType == 1) {
         echo("<b>" . $cd->item($i)->nodeName . ":</b> ");
         echo($cd->item($i)->childNodes->item(0)->nodeValue);
         echo("<br>");
      }
   }
?>

Catalog.xml

XML file having list of courses and details.This file is accessed by getcourse.php

<CATALOG>
   <SUBJECT>
      <COURSE>Android</COURSE>
      <COUNTRY>India</COUNTRY>
      <COMPANY>TutorialsPoint</COMPANY>
      <PRICE>$10</PRICE>
      <YEAR>2015</YEAR>
   </SUBJECT>
   
   <SUBJECT>
      <COURSE>Html</COURSE>
      <COUNTRY>India</COUNTRY>
      <COMPANY>TutorialsPoint</COMPANY>
      <PRICE>$15</PRICE>
      <YEAR>2015</YEAR>
   </SUBJECT>
   
   <SUBJECT>
      <COURSE>Java</COURSE>
      <COUNTRY>India</COUNTRY>
      <COMPANY>TutorialsPoint</COMPANY>
      <PRICE>$20</PRICE>
      <YEAR>2015</YEAR>
   </SUBJECT>
   
   <SUBJECT>
      <COURSE>Microsoft</COURSE>
      <COUNTRY>India</COUNTRY>
      <COMPANY>TutorialsPoint</COMPANY>
      <PRICE>$25</PRICE>
      <YEAR>2015</YEAR>
   </SUBJECT>
</CATALOG>

Related Posts:

  • PHP - Login Example PHP login with session Php login script is used to provide the authentication for our web pages. the Script executes after submitting the user logi… Read More
  • PHP - Form Introduction Dynamic Websites The Websites provide the functionalities that can use to store, update, retrieve, and delete the data in a database. What is the Fo… Read More
  • PHP - Object Oriented Programming We can imagine our universe made of different objects like sun, earth, moon etc. Similarly we can imagine our car made of different objects like whe… Read More
  • PHP - MySQL Login This tutorial demonstrates how to create a login page with MySQL Data base. Before enter into the code part, You would need special privileges to c… Read More
  • PHP - Complete Form This page explains about time real-time form with actions. Below example will take input fields as text, radio button, drop down menu, and checked … Read More

0 comments:

Post a Comment