Description

int count ( mixed var [, int mode])

Returns the number of elements in var, which is typically an array (since anything else will have one element).

If var is not an array, 1 will be returned (exception: count(NULL) equals 0).

If the optional mode parameter is set to COUNT_RECURSIVE (or 1), count() will recursively count the array. This is particularly useful for counting all the elements of a multidimensional array. The default value for mode is 0.

Please see the Arrays section of the manual for a detailed explanation of how arrays are implemented and used in PHP.

Example 1. count() example <?php $a[0] = 1; $a[1] = 3; $a[2] = 5; $result = count($a); // $result == 3 $b[0]  = 7; $b[5]  = 9; $b[10] = 11; $result = count($b); // $result == 3; ?>

Example 2. recursive count() example (PHP >= 4.2.0) <?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 ?>

See also is_array(), isset(), and strlen().