PHP loop increment randomly?

Question

We all know the basic

$i = 1;

while ($i<100){
    echo $i;
    $i++
}

Question: How do I increment $i by a random number between 1 and 5 e

Answer 1

In one line:

for ($i = 1; $i < 1000; $i += rand(1, 5)) echo $i;