Hi, i am having trouble in understanding how session works. I am trying to write a program that will repeatedly request a number to be entered and each time the number is entered the program is to print out:
- that number
- the sum of all the numbers entered
- the count in how many times I submitted
This is my code so far:
<?php
session_start();
if(isset($_session['count']))
{
$_session['count'] = $count;
}else{
$_session['count'] = 0;
}
?>
<html>
<head>
<title>number</Title>
<style>
</style>
<body>
<form action = "numbers.php" method = "post">
Numbers: <input type "text" name = "number" size = "6"/>
<input type = "submit" value = "submit" name = "submit"/>
<p>
</form>
</body>
</head>
</Html>
<?php
if(isset($_POST["submit"]))
{
$number = $_POST['number'];
If (is_numeric($number))
{
$count = $_session['count'] + $number;
print "Last number entered: ".$number;
print "<br>Total internal numbers: ".$count;
}
}
?>
Im trying to store my $count variable so each time i submit it outputs the total sum of the numbers entered
asked Aug 30, 2013 at 12:17
user2732815
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4 Answers 4
You set $_session['count'] = $count; before you have a variable called $count. You have to update the session value after you've set $count like:
$count = $_session['count'] + $number;
$_session['count'] = $count;
You can then replace the top of your script with:
if(!isset($_session['count']))
{
$_session['count'] = 0;
}
answered Aug 30, 2013 at 12:20
insertusernamehere
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1 Comment
Fluffeh
+1 for the explanation of WHY the code doesn't work as the question asker expects.
On the start you are using undefined variable $count. Edit it to:
if(!isset($_session['count']))
$_session['count'] = 0;
Then add a new line:
If (is_numeric($number))
{
$count = $_SESSION['count'] + $number;
$_SESSION['count'] = $count;
print "Last number entered: ".$number;
print "<br>Total internal numbers: ".$count;
}
OR second part edit to:
If (is_numeric($number))
{
$_SESSION['count'] += $number;
print "Last number entered: ".$number;
print "<br>Total internal numbers: ".$_SESSION['count'];
}
answered Aug 30, 2013 at 12:22
Lkopo
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3 Comments
STT LCU
the first if can be safely submitted to thedailywtf.com ;) seriously, can't you think of a better implementation? HINT: reverse the isset check, from true to false
user2732815
what if i wanted to have my have my output to get the sum of all numbers inputted for example: i inputted 1 the outcome is 1 then 1 is inputted again the outcome is 2
user2732815
nvm it turns out it was a syntax problem $_session should have been $_SESSION
<?php
if(isset($_POST["submit"]))
{
$number = $_POST['number'];
If (is_numeric($number))
{
$count = $_session['count'] + $number;
$_session['count'] = $count;
print "Last number entered: ".$number;
print "<br>Total internal numbers: ".$count;
}
}
?>
answered Aug 30, 2013 at 12:19
Dilip Godhani
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Comments
Here's the working example. [TESTED]
You have to assign $_SESSION['count']=$count;
<?php
session_start();
//Code commented as not required.
/*if(isset($_session['count']))
{
$_session['count'] = $count;
}else{
$_session['count'] = 0;
}
*/?>
<html>
<head>
<title>number</Title>
<style>
</style>
<body>
<form action = "" method = "post">
Numbers: <input type "text" name = "number" size = "6"/>
<input type = "submit" value = "submit" name = "submit"/>
<p>
</form>
</body>
</head>
</Html>
<?php
if(isset($_POST["submit"]))
{
$number = $_POST['number'];
if (is_numeric($number))
{
$count = $_SESSION['count'] + $number;
$_SESSION['count']=$count;
print "Last number entered: ".$number;
print "<br>Total internal numbers: ".$count;
}
}
?>
answered Aug 30, 2013 at 12:25
Shankar Narayana Damodaran
68.6k43 gold badges102 silver badges129 bronze badges
1 Comment
insertusernamehere
Don't say that the code in the beginning is not required.
$count = $_SESSION['count'] + $number; will through an undefined index notice the first time the script is called.lang-php
$cnt =0;thenisset($cnt)would be false!