Loop nested PHP array, shorter than parent

Question

Ok, so I have two arrays – one for posts, and a limited array of 5 values for the colors to give each post. What I want is for the posts to cycle through the array of colors, so that every 6th starts over. What I'm doing now works per se with a limited number of posts, but it's kind of hacky not very elegant:

$colors = array('yellow', 'red', 'blue', 'green', 'purple');

foreach($posts as $i => $post) {
  $color = $colors[$i];
  if ($i >= count($colors)) {
    $color = $colors[-count($colors) + $i];
    if ($i >= (count($colors) * 2)) {
      $color = $colors[(-count($colors) * 2) + $i];
    }
  }
//Do stuff here
}

I'm sure there's a smarter way to do this, I just don't know how.

Wanja Wilson · Accepted Answer · 2020-05-26 09:00:33Z

2

The modulus 5 (%5) will do the quick fix

for($i=0;$i<count($posts);$i++){
   $color=$colors[$i%5];
   # todo here
}

answered May 26, 2020 at 9:00

Wanja Wilson

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4 Comments

ruud Over a year ago

and then count($colors) instead of 5

Johan Martin Aarstein Over a year ago

That's awesome!

Wanja Wilson Over a year ago

@ruud that is making the program heavier, we already know the number

ruud Over a year ago

ok, but if the color array is changed, then the number must also be changed. Better to have a program that always works then to have a lighter program that is vulnerable to this kind of bugs.

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