validating radio button helpp!!

[furrls]

<?php

$SQL = "SELECT stu_satisfaction_tblquestions.question_id, stu_satisfaction_tblquestions.question, answer_type.* FROM stu_satisfaction_tblquestions LEFT JOIN answer_type ON stu_satisfaction_tblquestions.answers_id=answer_type.answers_id WHERE stu_satisfaction_tblquestions.answers_id BETWEEN '1' AND '2'
";
  
$result = mysql_query($SQL);
while ($data = mysql_fetch_array($result)) {

echo $data['question'].'<br/>';
echo '<input type="radio" name="answers['.$data['question_id'].']" id="'.$data['question_id'].'_'.$data['answer1'].'" value="1" /><label for="'.$data['question_id'].'_'.$data['answer1'].'">'.$data['answer1'].'</label><br/>';
echo '<input type="radio" name="answers['.$data['question_id'].']" id="'.$data['question_id'].'_'.$data['answer2'].'" value="2" /><label for="'.$data['question_id'].'_'.$data['answer2'].'">'.$data['answer2'].'</label><br/>';
echo '<input type="radio" name="answers['.$data['question_id'].']" id="'.$data['question_id'].'_'.$data['answer3'].'" value="3" /><label for="'.$data['question_id'].'_'.$data['answer3'].'">'.$data['answer3'].'</label><br/>';
echo '<input type="radio" name="answers['.$data['question_id'].']" id="'.$data['question_id'].'_'.$data['answer4'].'" value="4" /><label for="'.$data['question_id'].'_'.$data['answer4'].'">'.$data['answer4'].'</label><br/>';
echo '<input type="radio" name="answers['.$data['question_id'].']" id="'.$data['question_id'].'_'.$data['answer5'].'" value="5" /><label for="'.$data['question_id'].'_'.$data['answer5'].'">'.$data['answer5'].'</label><br/>';
}
?>

 

 

this is my form, how should i validate the radio buttons of it?

[Maq]

Sorry, but what do you mean validate?

[furrls]

validate as in u have to fill in all the radio buttons before you can submit if not a popout or any error will show it to the user

[Maq]

validate as in u have to fill in all the radio buttons before you can submit if not a popout or any error will show it to the user

 

By the nature of a radio button group, you can only select one.

[furrls]

yea, but i'm printing many question from a while loop so there will some question that the user will miss and he will just submit without any validation, so how could prevent that? such as user will have to comeplete ALL question before he is able to submit

[DavidAM]

I believe that if the user does not provide an answer for one of the groups, that group will not post at all. So you can count the number of answers you get and compare it to the number of questions you sent.

// Untested sample code
if (count($_POST['answers'])) < $numberOfQuestions) { 
  // NOT ALL OF THE QUESTIONS WERE ANSWERED
} else {
  foreach ($_POST['answers'] as $questionID => $answerValue) {
    // RECORD THE answerValue FOR THE questionID
  }
}

[furrls]

ok when i submit the form, it still insert the result despite blank answers at my process page.

 

 

this is my code at the process page

 

$studID = $_POST['studentID'];

		if ((count($_POST['answers'])) < (count($_POST['question']))) { 
  die("PLEASE COMPLETE ALL QUESIOJN");
} else {

		foreach ($_POST['answers'] as $qID=>$answer) {
		echo ''.$_SESSION['username'].' answered '.$answer.' for qID '.$qID.'<br/>';
	    $SQL = "INSERT INTO responses (student_id, question_id, answer) VALUES ('$studID','$qID', '$answer')";
		$result = mysql_query($SQL);
		}
		}

print "Thanks for voting!";