For creating a HTML element/tag you just need to write the name of it like the standard HTML element/tag.
For example:
<computer brand="Acer" price="28,900" ratings="4" id="pc">Acer Aspire R7</computer>
 you are done by creating a custom HTML element. But this will only support all major browsers, excluding Internet Explorer.

To make the custom HTML tag work with Internet Explorer you'll just need to write a single line of Javascript.
<script type="text/javascript">
   document.createElement("computer");
</script>
this will create an HTML element named as "computer".
Another point to note is, by default a custom element has a display inline. But you can change that with CSS.
<style type="text/css">
   #pc {
      display:block;
   }
</style>
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To learn more: http://www.x-tags.org/

Header function in PHP is quite powerful function. You have came across with such situations like: if some condition is false then the user should re-directed on the Index page of your website or may be after some seconds he should. Also Header function is useful while send the Content type of your webpage.

PHP: Re-directing to a webpage using Header Function.
<?php
   if(isset($_GET['id'])) {
        // Further Code..
   }else {
        header("Location: index.php");
   }
?>

PHP: Re-directing to a webpage after 10 seconds using Header Function.
<?php
   if(isset($_GET['id'])) {
       //Further code...
   }else {
       header("Refresh: 10; url=index.php");
   }
?>

PHP: Header Function to output a PDF file.
<?php
   header('Content-type: application/pdf');
?>

PHP: Header Function to convert PHP file into Text File.
<?php
   header('Content-Type: text/plain');
   echo "This is just a text file...we have converted a PHP file into a Plain Text File.";
?>

PHP: Header Function to convert PHP file into XML.
<?php
   header("Content-type: text/xml");
   echo "<?xml version='1.0' encoding='ISO-8859-1'?>";
   echo "<person>";
   echo "<name>Ashwin Pathak</name>";
   echo "<age>14</age>";
   echo "<twitter>@TheCodePress</twitter>";
   echo "</person>";
?>

Their are many other header functions you'll discover it by searching.

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It's really important for you to protect your website from hackers, but without removing any features from your website.
In this post we are going to understand how to solve the problem of XSS - Cross Site Scripting problems.

What is XSS:
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Counting your website's loading time is very useful and helpful for you to know that you need to make it more efficient or not.
Here, in this tutorial we are going to use PHP microtime() function to get the time and we'll be formatting it using number_format() function.
PHP code:
<?php
$mt = microtime(true);
        $format_time = number_format(microtime(true) - $mt, 2)." Seconds";
echo $format_time;
?>

If you are trying this code block on your on a blank page then probably you'll get 0.00 Seconds in results.
So to test it on a blank page follow this block of code:

PHP code:
<?php
$mt = microtime(true);
file_get_contents("http://www.thecodepress.info");
        $format_time = number_format(microtime(true) - $mt, 2)." Seconds";
echo $format_time;
?>

I'll always recommend you to use this but if you don't want to display it on your website then you can do something like commenting it something like this:

echo "<!--".$format_time."-->";

So after using that method the seconds will display in your website's HTML source code.
Another method which some other sites are using is to add the seconds at the bottom of the page (footer) you can too follow that.

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Getting Page URLs using Javascript is very useful in real life projects, it's been used by Facebook, Twitter for their share/tweet buttons, because when we click on the share button then we get the URL of the page we are browsing, and that's done using Javascript.


var url= "";
if (typeof this.href === "undefined") {
    url = document.location.toString().toLowerCase();
}
else {
    url= this.href.toString().toLowerCase();
}
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Have a look at the live demo also you can download the source file: