PHP - count

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Metóda - count

(PHP 4, PHP 5, PHP 7)

Counts elements in an array or in an object.

To count objects, the Countable interface needs to be implemented.

Procedurálne

• function count (mixed $array_or_countable, int $mode = COUNT_NORMAL) : int

Parametre

Názov	Dátový typ	Predvolená hodnota	Popis
$array_or_countable	mixed		An array or an object implementing the Countable interface.
$mode	int	COUNT_NORMAL	We can set the COUNT_RECURSIVE constant as the second parameter. In that case, the function returns the number of elements even in all subarrays, so we can get the number of elements in multidimensional arrays.

Mávratovej hodnoty

Vracia: int

The number of elements. If an array or a valid object with implemented Countable isn't set, it returns the value of 1. If it is NULL, it returns 0. Caution: the count() function returns 0 even for uninitialized variables.

Príklady

<?php
$array = [1, 2, 3, 4, 5, 6];
echo count($array);

Example with the COUNT_RECURSIVE parameter:

<?php
$array = [1, [4, 7, 11], 2, 3, 4];
echo count($array, COUNT_RECURSIVE);