Get checkbox value in PHP

<form action="index.php" method="post">

 <input type="checkbox" name="language[]" value="php" />PHP<br /> 

<input type="checkbox" name="language[]" value="html" />HTML<br /> 

<input type="checkbox" name="language[]" value="java" />Java<br />

 <input type="checkbox" name="language[]" value="c++" />C++<br /> 

<input type="submit" value="send" />

 </form>

foreach($_POST['language'] as $value)

 {

    echo 'Checked: '.$value.' ';

 }

If you check all the checkboxes, this script will output: 

Checked: php

Checked: html

Checked: java

Checked: c++

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