Counting number of elements in an array

[GaryAC]

Hi,

I have created a multidimensional array, like shown below:

$DVD = array(
);

Then I enter new elements
$DVD = array (
array (Title => $ckBasketContents,
Tax => "2" ,
Del => "2",
TPrice => $ckPrice )
);

However I cannot find out how to know the number of elements in the array. Is there a function I can use. I ahve looked on PHP.net but can't find one.

I want to create a for loop and print out all the elements of the 'DVD' array.

Can you help???

Thanks

Gary

[AstroTeg]

You play with count($DVD) ?

This will give you the number of elements in $DVD. The 2 dimensional array will be counted as 1 element. To get its number of elements, it would be count($DVD[0]).

[jsim]

for( $i=0; $i<count($DVD); $i++ ) {
 print_r($DVD[$i]);
 foreach( $DVD[$i] as $key => $value ) {
  print 'Key ='.$key.', value='.$value."<br>\n";
 }
}

[GaryAC]

Thanks alot that works.

I was hoping you may know how to add additional elements.

So if I add my first element as below:

$DVD = array (
array ("Title" => $ckBasketContents ,
Tax => "2" ,
Del => "2",
TPrice => $ckPrice )
);

However when I run this code for a second time with new values, it just overwrites my first element, instead becoming the second element in the array.

Could you help?

Thanks

Gary

[keith73]

Originally posted by GaryAC
Thanks alot that works.

I was hoping you may know how to add additional elements.

So if I add my first element as below:

$DVD = array (
array ("Title" => $ckBasketContents ,
Tax => "2" ,
Del => "2",
TPrice => $ckPrice )
);


However when I run this code for a second time with new values, it just overwrites my first element, instead becoming the second element in the array.


Could you help?

Thanks

Gary

What you are doing is redefining the array. what you did is the equivalent of saying A = 1, A = 2 so of course A is going to be equal to the last thing it was set to.

$DVD = array(array(var1 = "x",var2="y"),
             array(var1 = "a",var2="b"),
             array(var1 = "h",var2="o"));

• keith

[jsim]

Or you can use

$DVD[] = array (Title => $ckBasketContents, 
Tax => "2" , 
Del => "2", 
TPrice => $ckPrice ); 
$DVD[] = array (Title => $ckBasketContents, 
Tax => "2" , 
Del => "2", 
TPrice => $ckPrice ); 

This will adds two new elements into the $DVD array

[AstroTeg]

I'm thinking if you used a class for the $DVD array would be a lot easier to manage and code for.

class DVD
{
  var $Title, $Tax, $Del, $TPrice;
  function addItem($title, $tax, $del, $price)
  {
    $this->Title = $title;
    $this->Tax = $tax;
    $this->Del = $del;
    $this->price = $price
  }   // end function ...

}  // end class DVD

You can then do some nifty tricks with this.

$dvd = new DVD;
$dvd->addItem("My Title", 2, 2, 10);

// or if you want an array of DVDs
$dvd = array();
$dvd[0] = new DVD;
$dvd[0]->addItem("My Title", 2, 2, 10);
$dvd[1] = new DVD;
$dvd[1]->addItem("My Title", 2, 2, 10);

Just an idea... Its a different thought process that helps organize the data and manipulate it later on.

[GaryAC]

Oh, yep I see that now, I was redifining it each time, therefore overwriting it. However this code:

$DVD[] = array (Title => $ckBasketContents,

Tax => "2" ,

Del => "2",

TPrice => $ckPrice );

$DVD[] = array (Title => $ckBasketContents,

Tax => "2" ,

Del => "2",

TPrice => $ckPrice );

Does create 2 elements in the array. However the way I wanted it to work was so that each time a button is pressed it takes the required data and stores it in my variables ($ckPrice etc.) and then creates a new addition to the array.

So I would have one bit of code like:

$DVD[] = array (Title => $ckBasketContents,

Tax => "2" ,

Del => "2",

TPrice => $ckPrice );

Then each time a button is pressed it runs through this code adding additional elements each time. At the moment it still overwrites exsisting elements.

Thanks for your help, it is getting clearer slowly.

[keith73]

sounds like you want your script to maintain user input across pages.
in that case, you need a session to store the array in. You can't just add to an array each time someone clicks a button. the array is recreated each time unless you store it in either A) a database, or 😎 a session.

there's plenty of articles about sessions on phpbuilder as well as threads on the forums. Also, check out the manual.

• keith

[kevinsequeira]

hi gary,
is this thread an offshoot of http://www.phpbuilder.com/board/showthread.php?threadid=10263046

reg
kevin

[GaryAC]

Yep, both original problems have come together now.
Thanks for looking at the code for me.

I am going thru what you wrote now.

Much appreciated, thanks for your time and effort!!