html - Check-box form validation and submitting the form itself in PHP -

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the following program php i've written asks user select languages know, , displays selected languages in same page itself. able display error message if user has not selected languages. need display selected check-box items i.e, lanaguages result in same page itself. example: languages know english, french. can in this?

<?php $languages_error = $languages_result = $languages_list = ""; if($_server['request_method'] == 'post') {     if(empty($_post["languages"])){         $languages_error = "*select languages know";     }     else     {         $languages_result = "languages selected are";            }        } ?>  <!doctype html> <html> <head>  <title>check box page</title> </head> <body> <div id="contact">     <h1>what languages know?</h1><br>     <form action="checkbox.php" method="post">     <fieldset>               <input type="checkbox" name="languages[]" id="languages" value="english"><label = "gender">english</label></br>         <input type="checkbox" name="languages[]" id="languages" value="spanish"><label = "gender">spanish</label></br>         <input type="checkbox" name="languages[]" id="languages" value="french"><label = "gender">french</label></br>         <input type="checkbox" name="languages[]" id="languages" value="germany"><label = "gender">germany</label></br>         <input type="checkbox" name="languages[]" id="languages" value="chinese"><label = "gender">chinese</label></br>              <?php echo $languages_error, $languages_result ?></br>               <input type="submit" value="submit">     </fieldset>      </form> </div> </body> </html>

the selected languages (checkboxes) submitted , available php array.

to access these, can loop through them, , echo such:

$languages_result = $_post['languages'];  foreach ($languages_result $language) {     echo $language . '<br />'; }  // result is: // english // telegu // kanada

you can combine multiple elements within array, in string, using delimiter:

$languages_result = implode(', ', $_post['languages']);  echo $languages_result;  // result is: // english, telegu, kanada

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