php compare string by subscript

Question

Hello I have the following script in PHP:

$correct = array("a", "a", "a", "a");
$totalValue = "First Name: " . $fname . "\n";
$totalValue .= "About Our Mission | Question 01: " . $S1Q1 . "&nbsp;&nbsp;&nbsp;&nbsp;" . (compare $correct[0] with $S1Q1 choice) ? "Correct" : "Wrong" . "\n";

$S1Q1 is a variable which I accept from a form using radio button:

    <input type="radio" name="S1Q1" value="a" /> True
    <input type="radio" name="S1Q1" value="b" /> False

(compare $correct[0] with $S1Q1 choice) ? "Correct" : "Wrong" < how do I implement that in the php code.

And for the next radio choice I would compare $correct[1] with $S1Q2... and so forth.

php.net/manual/en/language.operators.comparison.php

PeeHaa
– PeeHaa

2012-09-14 17:36:24 +00:00
Commented Sep 14, 2012 at 17:36 — PeeHaa
– PeeHaa, Commented Sep 14, 2012 at 17:36

Philippe Boissonneault · Accepted Answer · 2012-09-14 17:37:44Z

2

This will check if value entered in radio button is = to correct answer

$S1Q1 = $_GET['S1Q1'];
($S1Q1 == $correct[0]) ? 'correct' : 'wrong'

answered Sep 14, 2012 at 17:37

Philippe Boissonneault

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5 Comments

Interfaith Over a year ago

I forgot to add $S1Q1 = $_POST['S1Q1']; that I already have on the file so this will take care of it. Thanks! and it's within single quote or double?

Philippe Boissonneault Over a year ago

Both single or double quote will work. stackoverflow.com/questions/3446216/…

Interfaith Over a year ago

From below i asked: What if i have multiple variables, S1Q1(Section 1 Question 1). So let's say i have S1Q1 S1Q2 S2Q1 S2Q2 S2Q3 S3Q1 S3Q2 and so forth, how can I check that? would you happen to know?

Philippe Boissonneault Over a year ago

Try using an array for your questions name="S1[0]", name="S1[1]", name="S2[0]", name="S2[1]" ... then $_POST['S1'] will return array of responses for all questions

Philippe Boissonneault Over a year ago

or you can use name="S[0][0]", name="S[0][1]", name="S[1][0]", name="S[1][1]" then you will only have to get $_POST['S']

Maks3w · Accepted Answer · 2012-09-14 17:38:33Z

1

You can access to the var with $_POST and/or $_GET

 $S1Q1 = $_POST['S1Q1']

answered Sep 14, 2012 at 17:38

Maks3w

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Comments

The System Restart · Accepted Answer · 2012-09-14 17:43:40Z

1

Main mechanism:

$S1Q1 = $_GET['S1Q1']; // or $_POST['S1Q1']
($correct[0] == $S1Q1 ) ? 'Correct' : 'Wrong'

Using loop:

if( isset($_POST) && !empty($_POST) ){
   foreach($_POST as $key => $val ) {
       $index = (int) str_replace('S1Q', '', $key ); // 1, 2, 3..
       $result = $val == $correct[ $index - 1 ] ? 'Correct' : 'Wrong';
   }
}

Use $result in you code.

edited Sep 14, 2012 at 17:43

answered Sep 14, 2012 at 17:36

The System Restart

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3 Comments

PeeHaa Over a year ago

OP wants to match against $correct[0] which isn't an array, but a string.

David Grenier Over a year ago

This would check to see if the post is equal to the correct answer for any question. OP wants to check to see if it's equal to one specific question.

Interfaith Over a year ago

What if i have multiple variables, S1Q1(Section 1 Question 1). So let's say i have S1Q1 S1Q2 S2Q1 S2Q2 S2Q3 S3Q1 S3Q2 and so forth, how can I check that?

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