Reading 2D Array from a text file, HELP! - php

Question

UPDATE: I realized that the issue was I was using print instead of echo to print the data, so it was showing the array instead of the data within it. Thanks a ton guys!
I currently have a text file that looks like this:
0,0,0,0,0
0,0,0,0,0
0,0,0,0,0
0,0,0,0,0
0,0,0,0,0
And I'm using this function:
function rFile($fileName){
$resultF = fopen($fileName, "r") or die("can't open file");
$array = array(); //Create the first dimension of a 2D array
$i=0;
while(!feof($resultF)){
$line = fgets($resultF);
$line = trim($line, "\n");
$tokens = explode(",",$line);
$array[$i]=array(); //Create the second dimension of the 2D array
$tokenCount = sizeof($tokens);
for($j=0; $j<$tokenCount; $j++){
$array[$i][$j] = $tokens[$j];
}
$i++;
}
return $array;
}
Essentially, it's supposed to read through the file, explode each "0" and store it in a 2D array, $array. For some reason it returns this:
Array[0]
Array[1]
Array[2]
....etc etc
Anyone know what I did wrong?

Answer 1

PHP multi-dimensional arrays are just arrays of arrays. There's no need for the inner loop. You can just do
while(...) {
... fgets stuff
$array[$i] = explode(',', $line);
$i++;
}
and get the same effect.

Answer 2

You're going about it the hard way, by using for loops and counters. By using PHP's $array[] = $val append syntax, you can save a lot of effort here.
// all the file handling code...
while(!feof($resultF)){
$line = fgets($resultF);
$line = trim($line, "\n");
$tokens = explode(",",$line);
// Append the line array.
$array[] = $tokens; //Create the second dimension of the 2D array
}
return $array;
Or to be even more concise:
$array[] = explode(",",$line);

Answer 3

try this :
function rFile($filename) {
$lines = file($filename);
if ($lines !== false) {
foreach ($lines as & $line) {
$line = explode(',', trim($line, '\n\r'));
}
}
return $lines;
}

Answer 4

$f = file($fileName);
$results = array();
foreach ($f as $line) {
$line = preg_replace("\n", "", $line);
$results[] = explode(",", $line);
}

Answer 5

Hmm, since this is comma delimitated, we can use fgetcsv to make this short and simple:
$file = fopen('test.txt', 'r');
$matrix = array();
while($entries = fgetcsv($file)) {
$matrix[] = $entries;
}
fclose($file);
Resulting array:
Array
(
[0] => Array
(
[0] => 0
[1] => 0
[2] => 0
[3] => 0
[4] => 0
)
[1] => Array
(
[0] => 0
[1] => 0
[2] => 0
[3] => 0
[4] => 0
)
[2] => Array
(
[0] => 0
[1] => 0
[2] => 0
[3] => 0
[4] => 0
)
[3] => Array
(
[0] => 0
[1] => 0
[2] => 0
[3] => 0
[4] => 0
)
[4] => Array
(
[0] => 0
[1] => 0
[2] => 0
[3] => 0
[4] => 0
)
)