How to print an entire array when third dimension is constant

Question

How to print an entire array when one index is constant.

For understanding purposes I have made this array

$actionF = array( "enemyHlth" => array(array()), "enemyBlts" => array(array()) );

with input

3 2 1 1 2 3 3 2 1 1 2 3 3 2 1 1 2 3

The array structure is supposed to store top three rows under a 3D array with 3rd dimension is just a constant "Enemy Health" while the bottom three in 3D array with same for 3rd dimension "Enemy Bullets". And both these two 3D arrays are stored in a single array called ActionF

Now when I try to print it

for($level=0;$level<$n;$level++){ $actionF["enemyHlth"] = array ( $level => fscanf($_fp,"%d\t%d\t%d\n") ); } for($bullets = 0;$bullets<$m; $bullets++){ $actionF["enemyBlts"] = array ( $bullets => fscanf($_fp,"%d\t%d\t%d\n") ); } print_r($actionF);

Output

3 2 1

I think it is printing the last index of above I/P. How to make a 2D array when third dimension is just a constant or is there something else am I missing?

I think that the way you're reading the data is bad. Try this: instead of those two for statements use this to display the whole array: print_r($actionF); I think you'll see the array does not contain what you expect, because you haven't read the file correctly. I could try helping you write the correct code but I'm not sure what you want to achieve. What should *$actionF["enemyHlth"]** and **$actionF["enemyBlts"]** contain at the end, assuming everything works well? Also, what are **$n** and **$m**? By the way, you're also missing a *$ in front of n here: $bullets<n — Andreyu
– Andreyu, Commented Jun 11, 2016 at 15:19
Its a challenge type program from Hacker's Rank. You can find it "A Super Hero" by ma5termind — phpNoob
– phpNoob, Commented Jun 11, 2016 at 15:29
You're not adding to the enemyHlth element each time through the first loop, you're simply overwriting it. If you want to add to an array, it should be either $actionF["enemyHlth"][] = new element; or $actionF["enemyHlth"][$key] = new element; depending on whether you're creating an indexed or associative array. Your question doesn't say what the array is supposed to look like. — Barmar
– Barmar, Commented Jun 11, 2016 at 15:44
Yes I changed them to this fscanf($_fp,"%d\t%d\t%d\n") now it is at least reading the line but it is only reading last line. — phpNoob
– phpNoob, Commented Jun 11, 2016 at 15:52
I tried print_r at first it showed something which made no sense but now it is initializing the 2 index of level and bullets correctly. — phpNoob
– phpNoob, Commented Jun 11, 2016 at 15:54

Andreyu · Accepted Answer · 2016-06-11 15:59:10Z

I rewrote your code and I think it works well like this:

First, the input:

$actionF = array( "enemyHlth" => array(), "enemyBlts" => array() ); for($level=0;$level<$n;$level++){ $line = fgets($_fp); $processed = explode(" ", $line); if ($line != false) { $actionF["enemyHlth"][$level] = $processed; } } for($bullets = 0;$bullets<$m; $bullets++){ $line = fgets($_fp); $processed = explode(" ", $line); if ($line != false) { $actionF["enemyBlts"][$bullets] = $processed; } }

And here's the output:

for($i=0;$i<$n;$i++){ for($j=0;$j<$m;$j++){ print $actionF["enemyHlth"][$i][$j]; } print "\n"; }

You have used fgets but it returns a string rather than a integer which is required.
Would like to know the purpose why you are checking the line since the input is already defined in proper format?
PHP will auto-cast to integers strings that look like integers. You can write this code: <?php $x = "12"; $x = $x + 5; echo $x; ?> and it will output 17. So it's ok if they are strings. If you want to be extra safe you can force cast them to integer. See this: stackoverflow.com/questions/8529656/… . Regarding your second question, I'm checking the line out of habit. In real-life programming you can't ever trust the input, you must check it. In your case you can remove the test because you can be sure the input is correct.

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