what is wrong with this code, I am using PHP 8 - php

Question

The loop never stop, also it always print, not only when $i is equal 8
$file = file_get_contents ($fileUrl);
$i = 0;
while ($line = explode ("\r\n", $file)) {
if ($i == 8) {
print_r ($line);
exit ();
}
$i++;
}
By the way, I need to use file_get_contents because I am using DOM, but I use that code because I need the data in line number 8, is there any better way to get a specific line

Answer 1

It is infinite because explode always explodes the entire file string and it never fails. You can read it into an array, but this is only useful without the exit if you are doing things with other lines in the file:
foreach(file($fileUrl) as $line) {
if ($i == 8) { // actually the ninth line
print_r ($line);
}
$i++;
}
Or read it as you are and get the proper line:
$lines = explode("\r\n", $file);
print_r($lines[8]); // actually the ninth line

Answer 2

You're not looping through the lines. You're setting $line to an array of all the lines, not a specific line. And you're setting it to the same thing every time through the loop, so the while condition will never change.
However, the loop should stop when $i == 8 because of the exit() call. It will then print all the lines with print_r().
If you want line 8, just index the array.
$lines = explode("\r\n", $file);
if (count($lines) >= 9) {
print_r($lines[8]);
}
FYI, you can also use file() to read a file and split it into lines:
$lines = file($fileUrl, FILE_IGNORE_NEW_LINES);

Answer 3

if you want to get the 8th line, you can simply do this:
$line = explode ("\r\n", $file)[8];
print_r($line);
without using a loop
and regarding you question for infinite loop
$line = explode ("\r\n", $file)
returns a true, since you are just assigning an array to this variable.
you should use foreach here like this:
foreach(explode ("\r\n", $file) as $line){
// TO DO
}