Title: AJAX querystring in wordpress
Last modified: August 21, 2016

---

# AJAX querystring in wordpress

 *  [supergirlgem](https://wordpress.org/support/users/supergirlgem/)
 * (@supergirlgem)
 * [12 years, 9 months ago](https://wordpress.org/support/topic/ajax-querystring-in-wordpress/)
 * I’m using the following javascript within my wordpress plugin, however the querystring
   doesn’t appear to work correctly.
 * Any ideas?
 * javascript:
 * ‘<script type=”text/javascript”>
    $(document).ready(function() { $(“#txtPostcode”).
   keyup(function() { var box=$(this).val();
 *  if(box.length >= 5)
    { 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(“
   txtPostcode”).value=xmlhttp.responseText; } } xmlhttp.open(“GET”,”postcodechecker.
   php?q=”+box,true); xmlhttp.send();
 *  }
 *  return false;
    });
 * });
    </script>’
 * php:
 * ‘<?php
    /* Plugin Name: Postcode Checker Plugin URI: [Enter your website URL]
   Description: Validate postcode against database Version: 1.0 Author: Gemma McCombe
   Author URI: [Enter your website URL] */
 * class PostcodeChecker extends WP_Widget {
    function PostcodeChecker() { $widget_ops
   = array( ‘classname’ => ‘PostcodeChecker’, ‘description’ => ‘Checks if valid 
   postcode in database before request button enable’ );
 *  $this->WP_Widget(
    ‘PostcodeChecker’, ‘Postcode Checker’, $widget_ops ); }
 *  function widget($args, $instance) { // widget sidebar output
    extract($args,
   EXTR_SKIP); echo $before_widget; // pre-widget code from theme print (‘<h2 class
   =”blocktitle”>Postcode Checker</h2> ‘); print (‘<input type=”text” id=”txtPostcode”/
   >   <input id=”btnRegister” type=”button” disabled=”disabled” value=”request 
   application form” />’); $q=$_GET[‘q’]; echo ‘ q=’ .$q. ‘‘;
 *  $mysqli= mysqli_connect(‘localhost’,’root’, ‘My5ql5s5s’);
 *  if (mysqli_connect_errno()) {
    printf(“Connect failed: %s\n”, mysqli_connect_error());
   exit(); }
 *  // A QUICK QUERY ON A FAKE USER TABLE
    $query = “SELECT * FROM db_wp_webteam1.
   wp_bduk_towns where town_postcode=’BT11ER'”; $result = $mysqli->query($query)
   or die($mysqli->error.__LINE__);
 *  // GOING THROUGH THE DATA
    if($result->num_rows > 0) { //while($row = $result-
   >fetch_assoc()) { // echo stripslashes($row[‘town_postcode’]); //} echo ‘Results
   found’; } else { echo ‘NO RESULTS’; }
 *  // CLOSE CONNECTION
    mysqli_close($mysqli);
 *  echo $after_widget; // post-widget code from theme
    }
 * }
 * add_action( ‘widgets_init’, create_function(”,’return register_widget(“PostcodeChecker”);’)
 * );
    ?>’

The topic ‘AJAX querystring in wordpress’ is closed to new replies.

## Tags

 * [ajax](https://wordpress.org/support/topic-tag/ajax/)
 * [javascript](https://wordpress.org/support/topic-tag/javascript/)
 * [php](https://wordpress.org/support/topic-tag/php/)
 * [Query String](https://wordpress.org/support/topic-tag/query-string/)

 * 0 replies
 * 1 participant
 * Last reply from: [supergirlgem](https://wordpress.org/support/users/supergirlgem/)
 * Last activity: [12 years, 9 months ago](https://wordpress.org/support/topic/ajax-querystring-in-wordpress/)
 * Status: not resolved

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