PHP loop increment randomly?

We all know the basic

$i = 1;

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

Question: How do I increment $i by a random number between 1 and 5 each time it loops?


Exactly like you described it in words: By increment it with a random number between 1 and 5.

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


In one line:

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

mt_rand is faster and uses uses the Mersenne Twister algorythm (1997)

while ($i < 1000) {
  echo $i;
  $i += mt_rand(1,5);

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