An example from php.net provides the following
<?php
$food = array('fruits' => array('orange', 'banana', 'apple'),
'veggie' => array('carrot', 'collard', 'pea'));
// recursive count
echo count($food, COUNT_RECURSIVE); // output 8
// normal count
echo count($food); // output 2
?>
How can I get the number of fruits and the number veggies independently from the $food array (output 3)?
You can do this:
echo count($food['fruits']);
echo count($food['veggie']);
If you want a more general solution, you can use a foreach loop:
foreach ($food as $type => $list) {
echo $type." has ".count($list). " elements\n";
}
Could you be a little lazy, rather than a foreach with a running count twice and take away the parents.
// recursive count
$all_nodes = count($food, COUNT_RECURSIVE); // output 8
// normal count
$parent_nodes count($food); // output 2
echo $all_nodes - $parent_nodes; // output 6
Just call count() on those keys.
count($food['fruit']); // 3
count($food['veggie']); // 3
You can use this function count the non-empty array values recursively.
function count_recursive($array)
{
if (!is_array($array)) {
return 1;
}
$count = 0;
foreach($array as $sub_array) {
$count += count_recursive($sub_array);
}
return $count;
}
Example:
$array = Array(1,2,Array(3,4,Array(5,Array(Array(6))),Array(7)),Array(8,9));
var_dump(count_recursive($array)); // Outputs "int(9)"
