Define array with variable index [closed] - php

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My code:
$rank_content = file('https://www.championsofregnum.com/index.php?l=1&ref=gmg&sec=42&world=2');
$line_count = 0;
//initializing only the first few keys because of no reason (the latter ones aren't in use yet)
$rankNameArr = array(0=>42,1=>42,2=>42,3=>42,4=>42,5=>42,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72);
$rankRlmpArr = array(0=>42,1=>42,2=>42,3=>42,4=>42,5=>42,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72);
while ($line = array_shift($rank_content)) { // retrieving line after line of the website, does work indeed
$line_count += 1;
if(strpos($line, "Warrior #") || strpos($line, "Archer #") || strpos($line, "Mage #"))
{
$rankNameArr[$line_count] = $line_count + 1; // HERE nothing happens
$rankRlmpArr[$line_count] = $line_count + 2; // nothing happens here, too
}
}
Why does
echo $rankNameArr[2];
echo $rankRlmpArr[2];
give me the value 42 instead of the correct value? If I replace $line_count with a real number, the script works properly.
My intention is to store the value $line_count + 1 into $rankNameArr at position $line_count. Not very complicated actually
EDIT -------------
Forget everything above, please. I finally reduced the script to the actual problem:
$arr = array(0=>42,1=>42,2=>42,3=>42,4=>42,5=>42,6=>42);
$counter=0;
for($i=0;$i<7;$i++) {
$arr[$counter]=$i;
}
echo $arr[5];
This sadly echoes 42. I have no idea how to have $arr[$counter] store the actual value of $i.

Answer 1

I have no idea how to have $arr[$counter] store the actual value of $i.
$counter is set to 0, so $arr[$counter] is the same as saying $arr[0]. If you echo $arr[0] you'll see that it is being changed while the rest are left alone, which means your code is working.
However if you want $counter to increment also, you just need to tell it to do so:
$arr = array(0=>42,1=>42,2=>42,3=>42,4=>42,5=>42,6=>42);
$counter=0;
for($i=0;$i<7;$i++) {
$counter++;
$arr[$counter]=$i;
}
echo $arr[5];