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+--- Thread: Problem with arrays (/showthread.php?tid=32434)
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Problem with arrays - El Forum - 07-23-2010
[eluser]silent_assassin[/eluser]
I have stored $this->input->post values in an array which is contained in one function.When i try to print the array in another function it displays following error.Both the functions present in same controller.
Quote:Message: Undefined variable: productsThis is my controller
Code:
<?php
class Product extends Controller
{
function Product()
{
parent::Controller();
}
function index()
{
$this->load->view('collect_info');
}
public function preview()
{
if($this->input->post('preview'))
{
$this->load->view('preview_product');
$products=array(
$this->input->post('p_name'),
$this->input->post('p_model'),
$this->input->post('p_short_desc')
);
}
elseif($this->input->post('cancel'))
{
}
}
public function create()
{
print_r($products);
}
}
?>Problem with arrays - El Forum - 07-23-2010
[eluser]silent_assassin[/eluser]
Any ideas?
Problem with arrays - El Forum - 07-23-2010
[eluser]mddd[/eluser]
You should read up on variable scopes. A variable that you declare inside a function only exists in that function.
If you want to access it from outside the function you need to store the variable somehere else. A logical place is to make it a class property (that is, a variable that is common to all functions in the class).
Code:
<?php
class Product extends Controller
{
var $products;
function Product()
{
parent::Controller();
}
.....
function some_function()
{
// to get to the products variable, use $this->products
$this->products = 'somevalue';
}
function other_function()
{
// you can still use the variable here, even though we're in another function
print_r($this->products);
}
}Problem with arrays - El Forum - 07-23-2010
[eluser]silent_assassin[/eluser]
Thanks for you help.Now i got it.But print_r($this->products) displays blank page?
Problem with arrays - El Forum - 07-23-2010
[eluser]mddd[/eluser]
Maybe you didn't put anything in the variable?? I can't judge that.
Problem with arrays - El Forum - 07-23-2010
[eluser]silent_assassin[/eluser]
No.When i print array in some_function() it displays correct results.But if i print same array in other_function() it displays a blank page!
Problem with arrays - El Forum - 07-23-2010
[eluser]mddd[/eluser]
Paste your entire code again then. And how are you calling those functions?
Problem with arrays - El Forum - 07-23-2010
[eluser]silent_assassin[/eluser]
Controller
Code:
<?php
class Product extends Controller
{
var $products;
function Product()
{
parent::Controller();
}
function index()
{
$this->load->view('collect_info');
}
function preview()
{
if($this->input->post('preview'))
{
$this->products=array(
$this->input->post('p_name'),
$this->input->post('p_model'),
$this->input->post('p_short_desc')
);
$this->load->view('preview_product');
print_r($this->products);
}
elseif($this->input->post('cancel'))
{
}
}
function create()
{
print_r($this->products);
}
}
?>Code:
<?php
$this->load->helper('form');
$this->definitions->includes();
echo form_open('product/preview');
echo PRODUCT_NAME.form_input('p_name').'<br>';
echo PRODUCT_MODEL.form_input('p_model').'<br>';
echo PRODUCT_SHORT_DESCRIPTION.'<br>';
echo form_textarea('p_short_desc').'<br>';
echo PRODUCT_FULL_DESCRIPTION.'<br>';
echo form_textarea('p_full_desc').'<br>';
echo PRODUCT_DATE_ADDED.'<br>';
echo PRODUCT_DATE_AVAILABLE.'<br>';
echo PRODUCT_QUANTITY.form_input('p_qty').'<br>';
echo PRODUCT_PRICE.form_input('p_price').'<br>';
echo PRODUCT_META_KEYWORDS.'<br>';
echo form_textarea('p_meta_keywords').'<br>';
echo PRODUCT_META_DESCRIPTION.'<br>';
echo form_textarea('p_meta_desc').'<br>';
echo form_submit('preview','Preview');
echo form_submit('cancel','Cancel');
echo form_close();
?>Code:
<?php
$this->definitions->includes();
$this->load->helper('form');
echo PRODUCT_NAME .$this->input->post('p_name').'<br>';
echo PRODUCT_SHORT_DESCRIPTION .$this->input->post('p_short_desc').'<br>';
echo PRODUCT_FULL_DESCRIPTION .$this->input->post('p_full_desc').'<br>';
echo PRODUCT_PRICE .$this->input->post('p_price').'<br>';
echo form_open('product/create');
echo form_submit('create_product','Create Product');
echo form_close();
?>Problem with arrays - El Forum - 07-23-2010
[eluser]mddd[/eluser]
So first you call index(). It shows a form. Then you call preview() with your form information. It shows some information and puts something in $this->products. Then you call create() with some form information. But when you call create(), $this->products is empty! Variables are not stored between requests! If you want something in $this->products in create(), you have to put it there! Now there is nothing, so it shows nothing.
Problem with arrays - El Forum - 07-23-2010
[eluser]silent_assassin[/eluser]
Yes.variables are not stored between requests.In this program,if i want to save the form data in an array and use it for inserting data into database in which part i have to store form data in array.