problem retrieve data from input form

[Anon]

i have problem how to retrive data from form ..

how i want to take data if my input text not declare static name . for example

<form action=test.php method=post>
<input type=text name="<?php echo"$number" ?>">
<input type="submit" value=submit name="submit">
</form>

and how i want to take data user input and show to test.php

if i change name name="<?php echo"$number" ?>" to name="test" i just call $test at test.php. but i name for input text declare by php where $number retrive from data ..

[rrijnders]

I don't know why you would want to dynamically name your form fields...
If you have, for instance, a random selection of questions for a test, you can still statically name the form fields and then include another hidden field to identify the questions so that "test.php" can find the right answers:

<FORM ACTION="test.php" METHOD="post">
<INPUT TYPE="text" NAME="Q1"><BR>
<INPUT TYPE="text" NAME="Q2"><BR>
<INPUT TYPE="text" NAME="Q3">
<INPUT TYPE="submit" VALUE="SUBMIT">
<INPUT TYPE="hidden" NAME="key" VALUE="<?php print $qid1 . ',' . $quid2 . ',' . $qid3; ?>">
</FORM>

test.php can then explode $key to know which questions were on the test.

But if you REALLY want to use dynamically named form fields, you will have to use variable-variables. Use a hidden field with a static name to hold the "name" of the dynamic field.

<form action=test.php method=post>
<input type=text name="<?php echo"$number" ?>">
<input type="hidden" name="qid1" value=<?php echo "$number" ?>">
<input type="submit" value=submit name="submit">
</form>

test.php can then reference the data input into the field with the dynamic name by using proper de-referencing:

// check answer to question one
if (${$qid1} == $answer) {
// it's right
}

HTH

-- Rich Rijnders
-- Irvine, CA US

[Anon]

i try using our code but not same what i need ...

i build online test and the number question for online test is not fixed maybe .. total question is 9 and maybe total question is 10.

so how to build form in case like this and how to check correct or not ...

example the script retrieve data from database ... exam

table multiple_choice
-question_id
-question
-answera
-answerb
-answerc
-answerd
-real_answer

form take data from table multiple_choice. all question in one page.

[rrijnders]

You are still dealing with a var-var on the test processing side. You can loop through the db questions and output your form fields with static names, but when you process the form, you will need to use a var-var as you loop through the form questions. The var-var will be used in the loop in place of the form field name:

================================
<?php

// connect to db
$db = mysql_connect("localhost", "user", "password");
mysql_select_db("database",$db);

// if this is not the post from the test form
if ($useraction != 'checkit') {

$query = "select * from multiple_choice";
$result = mysql_query($query, $db);

$qnum = 0;

print "<FORM ACTION='$PHP_SELF' METHOD='post'><BR>\n";

while ($row = mysql_fetch_array($result)) {

$question_formfield = 'Q' . $qnum;

print "Q. ".$row['question']."<BR>\n";
print "<INPUT TYPE='radio' NAME='$question_formfield'>$row['answera'] VALUE='A'><BR>\n";
print "<INPUT TYPE='radio' NAME='$question_formfield'>$row['answerb'] VALUE='B'><BR>\n";
print "<INPUT TYPE='radio' NAME='$question_formfield'>$row['answerc'] VALUE='C'><BR>\n";
print "<INPUT TYPE='radio' NAME='$question_formfield'>$row['answerd'] VALUE='D'><P><P>\n";

$questionkey .= $row['question_id'] . ',';

$qnum++;

}

print "<INPUT TYPE='hidden' NAME='qkey' VALUE='$questionkey'>\n";
print "<INPUT TYPE='hidden' NAME='useraction' VALUE='checkit'>\n";
print "<INPUT TYPE='submit' VALUE='Check Test'>\n";
print "</FORM><br>\n";

// check the answeres on the form
else {

$correct = 0;
$incorrect = 0;

// load answers into array so we don't overwork the db
$query = "select * from multiple_choice";
$result = mysql_query($query, $db); 
while ($row = mysql_fetch_array($result)) {
	$answer_array['question_id'] = $row['real_answer'];
}

// explode question id list from hidden
// form field into an array we can use
$questionkey = explode (',' , $qkey);

// now read through the form questions and check answers
$qnum = 0;
$question_formfield = 'Q' . $qnum;

while (is_set(${$question_formfield})) { // note how we use a var-vars here!

	if (${$question_formfield} == $answer_array[$questionkey[$qnum]]) {
		$correct++;
	}
	else {
		$incorrect++
	}

	$qnum++;
	$question_formfield = 'Q' . $qnum;
}	


print "You ansered $correct questions correctly and $incorrect questions incorrectly.";

}

?>

HTH

-- Rich Rijnders
-- Irvine, CA US

[rrijnders]

oops...

change those radio outputs to:

print "<INPUT TYPE='radio' NAME='$question_formfield' VALUE='A'>$row['answera']<BR>\n";

-- Rich