Count files in any directory using php..!!

Dr-Wordpress : how to count the number of files in any directory using php.

<?php 
    //Counts starts at 0
    $i = 0; 
    $dir = 'images/Trip_images/';
    if ($handle = opendir($dir)) {
        while (($file = readdir($handle)) !== false){
            if (!in_array($file, array('.', '..')) && !is_dir($dir.$file)) 
                $i++;
        }
    }
    // print count files in directory
    echo "There were $i files";
?>

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How to Display Child Category name and link in Wordpress.

One line code for displaying child category with relevant link. Dr-Wordpress
 DISPLAY CHILD CATEGORY IN WORDPRESS....!!! (dr-wordpress)

NOTE : "3" IS THE ID OF PARENT CATEGORY

<?php wp_list_categories('orderby=id&show_count=1&use_desc_for_title=0&child_of=3'); ?>

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MySQL Update Query In php..!!!

Dr-Wordpress : easy way to use update query in MySQL ( php )....!!!

<?php
ob_start();

 $db_name = 'database_name';
  $db_user = 'root';
  $db_pass = '';
 $db_host = 'localhost';
 $connection = mysql_connect($db_host, $db_user, $db_pass);
  mysql_select_db($db_name);

 ?>


$sql = "UPDATE $tablename  SET $column_name = '$value' WHERE Id='$id'";

   mysql_query($sql) or die(mysql_error());

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How to get the value of radio button.!!!

Dr-Wordpress : through Php How to get the value of radio button...!!!

<form name="my form" method="POST" action="validate.php"> 
<label >
  <input type="radio" id="id_radio1" name="name_radio" value="1"/>Dr-wordpress 1</label>
<label>
    <input type="radio" id="id_radio2" name="name_radio" value="2"/>Dr-wordpress 2</label>
<label>
     <input type="radio" id="id_radio3" name="name_radio" value="3"/>Dr-wordpress 3</label>

<input type="submit">
</form>

NOTE : Must gave the value in input tag other wise just ON/OFF will display 

<?php

if(isset($_POST['submit']))
{
    echo $radio_value1 = $_POST["name_radio"];
}
?>

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jquery show/hide Effect with radio button...!!!

Jquery show/hide Effect with radio button

In dr-wordpress Today i going to share an important example of jquery.
I am Also badly stuck, when i am doing this.
So i am sharing this code with you people..
<!-----------------------------------------------HTML CODE------------------------------------>
<form>
<input id="id_radio1" type="radio" name="name_radio" value="value_radio1" checked="checked"/>Radio1

<input id="id_radio2" type="radio" name="name_radio" value="value_radio2" />Radio2

<input id="id_radio3" type="radio" name="name_radio" value="value_radio3" />Radio3
                 
</form>
              <div id="divs">
                   <div id="div1">One</div>
                   <div id="div2">Two</div>
                   <div id="div3">Three</div>     

              </div>
<!-----------------------------------------------CSS CODE----------------------------------------->
#divs div {
    display:none;

}
<!-----------------------------------------------Jquery CODE-------------------------------------->
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script>
 $(function() {
          var $divs = $('#divs > div');
          $divs.first().show()
          $('input[type=radio]').on('change',function() {
                  $divs.hide();
                  $divs.eq( $('input[type=radio]').index( this ) ).show();
           });

});
<script>

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DR-WORDPRESS : How to make responsive design through media query.

At different resolution some time we need different style ( css ) for a particular div or span etc so we use media query for it.

NOTE: 980px means That less than 980px resolution   this is style is active.

 @media screen and (max-width: 980px) {

#header .inner 
{
    float: left;
    padding-left: 0px;
    width: 475px;
}

 }

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