Multidiminsonal Arrays and Undefined offset

Tanner_of_Lynd

Since multidimensional arrays are the things of 3rd graders, this is killing me to ask, but there's something in php I'm not understanding.

All I want to do is load an array and then display it in a table. I can get a two column table to happen while I'm loading the array, but to display it out in eight columns I can't write the table till after the entire array is loaded.

After I load the array I can't even get it to print. What am I doing wrong:

<?php
error_reporting(E_ALL);
$counter = 0;


$cum = fopen ('./cum.csv','r');

echo "<TABLE BORDER=4 BGCOLOR=#F5F5F5 CELLSPACING=4 CELLPADDING=4>";
while (!feof($cum)) {
  $counter++; //increment count

  $ball = fgetcsv($cum,1024,",");

$balls = array($counter => $ball);
echo "<tr>";
echo "<td>{$balls[$counter][0]}</td><td>{$balls[$counter][1]}</td>";

echo "</tr>";
}

echo "</table>";


    for ($i=1; $i <=9; $i++){

      for ($j=0; $j <=1; $j++){

      print "{$balls[$i][$j]}";
    }

    print "<br /><\n>";
}

echo "Finish"

 ?>

You can see the run and puke here: www.winlotto5.com/test/cumtable.php

leatherback

Hey there,

Not sure why you need to do a three-dimensional array here? Why not spit it out in a 8-col table straight away?

You really need to explain what you need to do, as this is not clear. Hwat have you tried? How do you need the table to be organized?

Tanner_of_Lynd

The main question in this tread is really asking the question: “Why do I have no control of a multidimensional array.”

The code above is reading a comma-delimited text file that contains 39 rows and two columns. If you run the link you’ll see the basic shape in the table output. That table is created while the file is read into the array. Its format however will not do. The objective is to load the array then write a table that presents 10 rows of 8 columns or 5 rows of 16 columns, whichever I like. Creating the table should be easy enough once I can successfully display the variables loaded from the file.

What you see by running the link is successful array load with table output, but once the array is loaded even a simply print statement baulks at displaying the variables. There is something fundamental about using a multi-dim array I don’t understand in PHP. I’m hoping you guys can point me to the lack of understanding.

I’m green to arrays in PHP, but I’ve been working with them 20 or 30 years in Basic and I shouldn’t have such an easy stumble on the issue.

I’ve got to get a handle on these arrays because there are many different tables I need to create, with much, much more data to display.

Thanks.

Weedpacket

What's clobbering you is probably this line:

$balls = array($counter => $ball);

Every time through the loop, you're creating a new array with one element, with $counter as the key and $ball as the value.

Try assigning to the array element, videlicet

$balls[$counter] = $ball;

There may be other issues but that depends on things like whether or not there are at least 9 rows in the table (it might be safer to use the final value of $counter to control that loop), that each row contains at least two elements and other such stuff.

Tanner of Lynd wrote:
20 or 30 years in Basic

I feel your pain.

Tanner_of_Lynd

Thanks Weed, I'll give it a try tonight.

There is 39 rows in the file, I've got 9 in the for loop for display because I was setting up for table generation to display $counter, $counter+10, $counter+20, $counter+30, to end up with a wide table, short in length.

'preciate the help.

Weedpacket

I suspect it would be simpler to write one loop that goes through the entire set of results, and decide whether to start a new row by looking at the value of the loop counter and seeing how close it is to a multiple of 10. (If the row starts when $counter=1, 11, 21, 31, 41, etc., the common feature of all those numbers is that $counter%10==1).