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23 December 2010

how to use redirect using Javascript

javascript
Redirects are useful when doing some work and needs to go to another page after finished the work.

For example : after showing successful login , you will be redirected to home page.

Using button as link using javascript inside HTML code:

<input type="button" value="Visit Google" onclick="window.location = 'http://www.google.com' "/>

Use one line code to redirect :

 window.location = "http://www.google.com" ;


Note: The window.location object can be used to get the current page address (URL) and to redirect the browser to a new page.
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how to get input value using javascript

javascript
Using only javascript and html,  we can get data from input box. using
document.getElementById('web').value
where, web = id of the input text box.

Sample code that use javascript to get input value:

[Note : Paste this code inside the <body> tag. to work.]

<script type="text/javascript">
function visit()
{
    var t = document.getElementById('web').value ;
    alert( t );
   
}
</script>

Enter Web Address: <input type="text" name="web" id="web"/>
<input type="button" value="Show what is in this Text Box" onclick='show();'/>

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How to use PHP bot to get Wikipedia definitions

php
This code helps to parse wikipedia definitions on given keyword.
Here is a code given that parse webpage using php with Curl extension.
A function is given which takes the keyword as input and outputs the array which holds the data.
$url : Holds the link to be parsed.

File name : wiki_parse.php
<?php
//FUNCTION THAT :PARAMETER - KEYWORD , AND RETURNS WIKI DEFINITION (IN ARRAY FORMAT)
function wikidefinition($s) {
//ENGLISH WIKI
    $url = "http://en.wikipedia.org/w/api.php?action=opensearch&search=".urlencode($s)."&format=xml&limit=1";
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_HTTPGET, TRUE);
    curl_setopt($ch, CURLOPT_POST, FALSE);
    curl_setopt($ch, CURLOPT_HEADER, false);
    curl_setopt($ch, CURLOPT_NOBODY, FALSE);
    curl_setopt($ch, CURLOPT_VERBOSE, FALSE);
    curl_setopt($ch, CURLOPT_REFERER, "");
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
    curl_setopt($ch, CURLOPT_MAXREDIRS, 4);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 6.1; he; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8");
   
    $page = curl_exec($ch);
    $xml = simplexml_load_string($page);
    if((string)$xml->Section->Item->Description) {
        return array((string)$xml->Section->Item->Text,
                     (string)$xml->Section->Item->Description,
                     (string)$xml->Section->Item->Url);
    } else {
        return "";
    }
}
//END OF FUNCTION WIKIDEFINITIONS

//USE OF FUNCTION
$data = wikidefinition('Bangladesh') ;
//var_dump( wikidefinition('bangladesh') ) ; //displays the array content
echo "Word:"       . $data[0] . "<br/>";
echo "Definition:" . $data[1]  . "<br/>";
echo "Link:"       . $data[2] . "<br/>";

 ?>

Thanks to barattalo.it
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