count

Count all elements in an array, or something in an object

Syntax

count ( mixed $array_or_countable [, int $mode = COUNT_NORMAL ] ) : int

Parameters

array_or_countable

An array or countable object.

mode

If the optional mode parameter is set to COUNT_RECURSIVE (or 1), count() will recursively count the array.

Return

Returns the number of elements in array_or_countable. When the parameter is neither an array nor an object with implemented Countable interface, 1 will be returned. There is one exception, if array_or_countable is NULL, 0 will be returned.

Examples

1 · array_or_countable · Array

<?

$array_or_countable = array(0, 1, 2);

$return = count($array_or_countable);

echo $return;

?>
3

2 · array_or_countable · Countable

<?

class myclass implements Countable {
    protected $mycount = 3;

    public function count() {
        return $this->mycount;
    }
}

$array_or_countable = new myclass;

$return = count($array_or_countable);

echo $return;

?>
3

3 · array_or_countable · false

<?

$array_or_countable = false;

$return = count($array_or_countable);

echo $return;

?>
1

4 · array_or_countable · null

<?

$array_or_countable = null;

$return = count($array_or_countable);

echo $return;

?>
0

5 · mode · COUNT_NORMAL

<?

$array_or_countable = array(0, 1, array(0, 1));
$mode = COUNT_NORMAL;

$return = count($array_or_countable, $mode);

echo $return;

?>
3

6 · mode · COUNT_RECURSIVE

<?

$array_or_countable = array(0, 1, array(0, 1));
$mode = COUNT_RECURSIVE;

$return = count($array_or_countable, $mode);

echo $return;

?>
5

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