What is the difference between using || and <= in a while loop in PHP?

Using || in a while loop in PHP means that the loop will continue as long as either one of the conditions is true. On the other hand, using <= in a while loop means that the loop will continue as long as the condition is less than or equal to a certain value. It's important to choose the appropriate operator based on the specific conditions you want to check in the loop.

// Example of using || in a while loop
$counter = 0;
while ($counter < 5 || $counter > 10) {
    echo $counter . " ";
    $counter++;
}
// Output: 0 1 2 3 4

// Example of using <= in a while loop
$counter = 0;
while ($counter <= 5) {
    echo $counter . " ";
    $counter++;
}
// Output: 0 1 2 3 4 5