PHP Variable Value Change Using IF

Question

I am having an issue with my variables value after the IF function. I am looking to change the value of the variable depending on the outcome value of $answer1 on the sender page. However, when I print $answer1 after the IF process, the value has not changed. Before IF it is 5, after the IF process, the Print still produces a 5.

Please can someone advise me how I can increment/decrement using the IF function and affect the value of $answer1 afterwards.

Thank you.

<?php
    $finalvalue=5;

    $answer1=$_GET['answer1'];

    if ($answer1=="1"){$finalvalue+2;}
    elseif ($answer1=="2"){$finalvalue+1;}
    elseif ($answer1=="3"){$finalvalue-1;}
    elseif ($answer1=="4"){$finalvalue-2;};
    print "$finalvalue"
?>

are you looking for somthing like $finalvalue=$finalvalue+2; and so on? — jogo
– jogo, Commented Nov 21, 2015 at 15:08

Kostas Mitsarakis · Accepted Answer · 2015-11-21 15:13:06Z

1

You need to increment on the variable. Have a look here and try the following:

$finalvalue = 5;

$answer1 = $_GET['answer1'];

if ($answer1 == "1") {
    $finalvalue += 2;
} elseif ($answer1 == "2") {
    $finalvalue++;
} elseif ($answer1 == "3") {
    $finalvalue--;
} elseif ($answer1 == "4") {
    $finalvalue -= 2;
}
echo $finalvalue;

edited Nov 21, 2015 at 15:13

answered Nov 21, 2015 at 15:00

Kostas Mitsarakis

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Comments

Chandan · Accepted Answer · 2015-11-21 15:01:45Z

0

You are not properly updating the $finalvalue. It should be as follows -

<?php
$finalvalue=5;

$answer1=$_GET['answer1'];

if ($answer1=="1"){ $finalvalue = $finalvalue+2;}
elseif ($answer1=="2"){ $finalvalue =  $finalvalue+1;}
elseif ($answer1=="3"){$finalvalue =  $finalvalue-1;}
elseif ($answer1=="4"){$finalvalue =  $finalvalue-2;};
echo $finalvalue;
?>

answered Nov 21, 2015 at 15:01

Chandan

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5 Comments

Jordan Blake Over a year ago

Thank you very much, this has worked, I did try something similar to this earlier however I used the ++ function and I am not sure I coded it correctly!

Jordan Blake Over a year ago

Thank you very much for your help

Jordan Blake Over a year ago

Thank you for your help earlier Chandan, I have encountered one issue with it though, on application, the last three increments of the final "else if" function have not been affecting the value or $finalvalue, is there something I should be adding to the end of my string for them to take effect? or should I be using pre incrementation as opposed to post incrementation? Please see below. thanks.

Jordan Blake Over a year ago

$answer5=$_GET['answer5']; if ($answer5=="17"){ $finalvalue = $finalvalue+2;} elseif ($answer1=="18"){ $finalvalue = $finalvalue+1;} elseif ($answer1=="19"){$finalvalue = $finalvalue-1;} elseif ($answer1=="20"){$finalvalue = $finalvalue-2;}; print "$finalvalue";

Chandan Over a year ago

this should work. Can you confirm by putting echo statements in those elseif block if it is getting called ?

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