<form method="post" action="">
    <input type="checkbox" name='programlama_dili[]' value="PHP"> PHP<br/>
    <input type="checkbox" name='programlama_dili[]' value="JAVA"> JAVA <br/>
    <input type="checkbox" name='programlama_dili[]' value="C#"> C# <br/>
    <input type="submit" value="Submit" name="gonder_arslan_parcasi">
</form>

<?php
if(isset($_POST['gonder_arslan_parcasi'])){
    if(!empty($_POST['programlama_dili'])) {
        foreach($_POST['programlama_dili'] as $dil){
            echo $dil.' ';
        }
    }
}
?>