Is checkboxes checked or not? - php

Question

Need som serious help!
<?php
$php1 = !isset($_GET['php1']);
$php2 = !isset($_GET['php2']);
$php3 = !isset($_GET['php3']);
$php4 = !isset($_GET['php4']);
$php5 = !isset($_GET['php5']);
if ($php1 == 'one' && $php2 == 'two' && $php5 == 'five') {
echo "<h2>R</h2>WRONG";
} else {
echo "<h2>R</h2>CORRECT";
}
?>
HTML
<form action="One.php" method="get">
<input type="checkbox" name="php1" value="one"> q1<br>
<input type="checkbox" name="php2" value="two"> q1<br>
<input type="checkbox" name="php3" value="three"> q1<br>
<input type="checkbox" name="php4" value="four"> q1<br>
<input type="checkbox" name="php5" value="five"> q1<br>
<br>
<input type="submit" value="Send!">
</form>
If all checkboxes are empty, there will be a message saying that. How do I do it?
If I dont check any boxes, it tells me the answers are correct. That's wrong.

Answer 1

<?php
If(isset($_GET['php1'])){
$php1 = 1;
}else{
$php1 = 0;
}
If(isset($_GET['php2'])){
$php2 = 1;
}else{
$php2 = 0;
}
If(isset($_GET['php3'])){
$php3 = 1;
}else{
$php3 = 0;
}
If(isset($_GET['php4'])){
$php4 = 1;
}else{
$php4 = 0;
}
If(isset($_GET['php5'])){
$php5 = 1;
}else{
$php5 = 0;
}
if ($php1 && $php2 && $php5) {
echo "<h2>Resultat</h2>Du svarade rätt på frågan";
} else {
echo "<h2>Resultat</h2>Du svarade fel på frågan";
}
Try this.
Each php variable will have the value of 1 or 0 (true/false). Thus the if only needs to check it if it is or not.

Answer 2

You have to remember that UN-CHECKED Checkboxes are not even sent to the PHP script $_POST/$_GET by the browser.
So there existance is normally all you need to know.
First you must check that they were passed to the script and then check its value, otherwise you will receive undefined index errors for each checkbox that was not checked by the user
if (isset($_GET['php1']) && $_GET['php1'] != '' ) {
Although as the checkbox called php1 can only be set to the value you give it, its value can be assumed and all you need to do is
if (isset($_GET['php1']) ) {
// php1 was checked
Also isset() will test more than one variable exists using an AND. So you could write your code as
if ( isset($_GET['php1'], $_GET['php2'], $_GET['php5']) ) {
echo "<h2>Resultat</h2>Du svarade rätt på frågan";
} else {
echo "<h2>Resultat</h2>Du svarade fel på frågan";
}

Answer 3

$php1 = !isset($_GET['php1']);
This means $php1 is either true or false. If you want the value of php1 get parameter then remove isset cover, just
$_GET['php1'];
isset is used to check whether the variable exist or not after that use $_GET['php1'];