store form data in an array using session

Question

I want to add form data into an array using session.
How can I do this please help me.
My HTML form is:

    <form action="#" method="post">
    Roll No:<input type="text" name="rollno" value="" id="rollno"  />
    <input type="submit" name="submit" value="Submit" />
    </form>

And my PHP code is:

    <?php
      session_start();
      $_SESSION['rollno'] = isset($_POST['rollno']);
      echo $_SESSION['rollno'];              
    ?>

I want to insert roll no into an array.

I have a record of 10 students. When I am inserting the first student Roll No then it prints the roll no, but when I insert the second student Roll No it overwrites the first student record.

I want to display all 10 student roll nos on same page.
How can I do this?

Make the session var an array and use 'array_push' to add to it — ethrbunny
– ethrbunny, Commented Mar 15, 2013 at 11:56
I've never used # as the action such as <form action="#" method="post">. Think it is a good idea? — user1032531
– user1032531, Commented Mar 15, 2013 at 12:00
@Ander2. Thanks. Figured so. Think it is a good idea? Any security risks? — user1032531
– user1032531, Commented Mar 15, 2013 at 12:02

Prasanth Bendra · Accepted Answer · 2013-03-15 11:57:06Z

2

Start the session before you out put any thing to the page, ie before html code
Make session a multi dimensional array

Remove isset from isset($_POST['rollno']);

<?php
      session_start();
      $_SESSION['rollno'][] = $_POST['rollno'];
      print_r($_SESSION['rollno']);              
?>

answered Mar 15, 2013 at 11:57

Prasanth Bendra

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2 Comments

Anjani Gupta Over a year ago

how multi dimensional array will be created?

user1032531 Over a year ago

@AnjaniGupta. PHP will automatically make it. Probably more readable if you define it as one if it is currently not set.

Ander2 · Accepted Answer · 2013-03-15 12:33:09Z

1

$_SESSION['rollno'] should be an array not a simple variable.

Something like this:

  <?php
  //Define somewhere $_SESSION['rollno'] as array. ONLY ONCE. Note that session must be started.
  session_start();
  if (!isset($_SESSION['rollno'])){
      $_SESSION['rollno'] = array();
  }


  if(isset($_POST['rollno'])){
       array_push($_SESSION['rollno'],$_POST['rollno']);
  }
  foreach ($_SESSION['rollno'] as $item){
        echo $item;  
  }   
  ?>

edited Mar 15, 2013 at 12:33

answered Mar 15, 2013 at 11:59

Ander2

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3 Comments

user1032531 Over a year ago

Need session_start() before using sesssions.

Anjani Gupta Over a year ago

I tried this but it print only last inserted value . I have to print all the 10 records.

Ander2 Over a year ago

@AnjaniGupta make sure $_SESSION['rollno'] is being defined only once. Otherwise you are creating the variable in every run, so it will only store the last value. I've edited the example.

SachinGutte · Accepted Answer · 2013-03-15 11:57:20Z

0

session_start();
if(isset($_POST['submit'])){
  if(isset($_POST['rollno'])){
      $_SESSION['rollno'] = $_POST['rollno'];
      echo $_SESSION['rollno'];        
  } 
}

Check first if form is submitted, then roll is set and if yes, assign it to session var.

answered Mar 15, 2013 at 11:57

SachinGutte

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Comments

Michael Antonius · Accepted Answer · 2013-03-15 12:03:35Z

0

i know !

Let's try :

<?php
session_start();
$_SESSION['rollno'] = Array();
$_SESSION['rollno'][] = $_POST['rollno']; 
$_SESSION['rollno'][] = $_POST['rollno'];
var_dump($_SESSION['rollno']);
?>

You can access it from loop too .. Good luck

answered Mar 15, 2013 at 12:03

Michael Antonius

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Comments

user1032531 · Accepted Answer · 2013-03-15 12:07:32Z

0

Almost there

<?php
  session_start();
  !isset($_SESSION['rollno']){$_SESSION['rollno']=array();}
  $_SESSION['rollno'][] = $_POST['rollno'];
?>

Also, recommend setting action to something:

echo("<form action={$_SERVER['PHP_SELF']} method='post'>");

Some don't like to use PHP_SELF and recommend hard coding it

edited Mar 15, 2013 at 12:07

answered Mar 15, 2013 at 11:57

user1032531

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