Count() and sizeof() not working with multidimensional array?

Question

PHP

array$data:

$data['films']
  $data['films'][$i]['title']
  $data['films'][$i]['cover']
  $data['films'][$i]['actors']
  $data['films'][$i]['genres']
$data['genres']
$data['genre']

php

$vars = $data['films'][$i];

  $count = count($vars['genres']);
  if ($count >0) {
  
    for ($i = 0; $i < $count; $i++) {
      echo '<a class="entry__tag" href="/'.$vars['genres'][$i]['url'].'">'.$vars['genres'][$i]['name'].'</a>, ';
    }
  }

The code does not work and loads the processor wildly. The page is not rendered. I tried sizeof(), the reason may be that not all movies have $vars['genres'].

Answer 1

Is it okay that you use the $i variable in the main loop and in the inner one?
They somehow overwrite each other, and at the output, FIG knows what is happening, most likely an eternal cycle.
foreach to help, both for the main loop and for the inner loop shown here.
Forget about for $i and that's it, an extra hassle.

Answer 2

php.net/manual/en/function.count.php
If the optional mode parameter is set to COUNT_RECURSIVE (or 1), count() will recursively count the number of array elements. This is especially useful for counting all elements of multidimensional arrays.