Can I use array_push on a SESSION array in php?

I have an array that I want on multiple pages, so I made it a SESSION array. I want to add a series of names and then on another page, I want to be able to use a foreach loop to echo out all the names in that array.

This is the session:

$_SESSION['names']

I want to add a series of names to that array using array_push like this开发者_Go百科:

array_push($_SESSION['names'],$name);

I am getting this error:

array_push() [function.array-push]: First argument should be an array

Can I use array_push to put multiple values into that array? Or perhaps there is a better, more efficient way of doing what I am trying to achieve?

---

Yes, you can. But First argument should be an array.

So, you must do it this way

$_SESSION['names'] = array();
array_push($_SESSION['names'],$name);

Personally I never use array_push as I see no sense in this function. And I just use

$_SESSION['names'][] = $name;

---

Try with

if (!isset($_SESSION['names'])) {
    $_SESSION['names'] = array();
}
array_push($_SESSION['names'],$name);

---

 $_SESSION['total_elements']=array();
 array_push($_SESSION['total_elements'], $_POST["username"]);

---

Yes! you can use array_push push to a session array and there are ways you can access them as per your requirement.

Basics: array_push takes first two parameters array_push($your_array, 'VALUE_TO_INSERT');. See: php manual for reference.

Example: So first of all your session variable should be an array like:

$arr = array(
    's_var1' => 'var1_value',
    's_var2' => 'var2_value'); // dummy array
$_SESSION['step1'] = $arr;     // session var "step1" now stores array value

Now you can use a foreach loop on $_SESSION['step1']

foreach($_SESSION['step1'] as $key=>$value) {
    // code here
}

The benefit of this code is you can access any array value using the key name for eg:

echo $_SESSION[step1]['s_var1']  // output: var1_value

NOTE: You can also use indexed array for looping like

$arr = array('var1_value', 'var1_value', ....);

BONUS: Suppose you are redirected to a different page You can also insert a session variable in the same array you created. See;

// dummy variables names and values
$_SESSION['step2'] = array(
    's_var3' => 'page2_var1_value',
    's_var4' => 'page2_var2_value');


$_SESSION['step1step2'] = array_merge($_SESSION['step1'], $_SESSION['step2']);

// print the newly created array
echo "<pre>";  // for formatting printed array
var_dump($_SESSION['step1step2']);
echo "<pre>";

OUTPUT:

// values are as per my inputs [use for reference only]
array(4) {
  ["s_var1"]=>
  string(7) "Testing"
  ["s_var2"]=>
  int(4) "2124"
  ["s_var3"]=>
  int(4) "2421"
  ["s_var4"]=>
  string(4) "test"
}

*you can use foreach loop here as above OR get a single session var from the array of session variables.

eg: 
echo $_SESSION[step1step2]['s_var1'];
OUTPUT:
Testing

Hope this helps!

---

Try this, it's going to work :

session_start();

if(!isset($_POST["submit"]))
{
    $_SESSION["abc"] = array("C", "C++", "JAVA", "C#", "PHP");
}

if(isset($_POST["submit"]))
{
    $aa = $_POST['text1'];

    array_push($_SESSION["abc"], $aa);

    foreach($_SESSION["abc"] as $key => $val)
    { 
        echo $val;
    }
}

---

<?php
session_start();

$_SESSION['data']= array();
$details1=array('pappu','10');
$details2=array('tippu','12');

array_push($_SESSION['data'],$details1);
array_push($_SESSION['data'],$details2);

foreach ($_SESSION['data'] as $eacharray) 
{
 while (list(, $value) = each ($eacharray)) 
    {
        echo "Value: $value<br>\n";
    }
}
?>

output

Value: pappu
Value: 10
Value: tippu
Value: 12