PHP: count() function

PHP: Count all elements in an array

The count() function is used to count the elements of an array or the properties of an object.

Note: For objects, if you have SPL installed, you can hook into count() by implementing interface Countable. The interface has exactly one method, Countable::count(), which returns the return value for the count() function.


(PHP 4 and above)


count(array_name, mode) 


Name Description Required /
array_name Specifies the array or object to count. Required Array
mode Sets the mode of the function.
Possible values :
COUNT_RECURSIVE (or 1) : here the count() function counts the array recursively. This is useful for counting all the elements of a multidimensional array.
The default value is 0.
Optional Integer

Return value:

The number of elements in array_name.

Value Type: Array.

Note: The count() function may return 0 for a variable which is not set, but it may also return 0 for a variable that has been initialized with an empty array.
The isset() function should be used to test whether a variable is set or not.

Example :

$a[0] = 'Language';
$a[1] = 'English';
$a[2] = 'Math';
$a[3] = 'Science';
$result = count($a);
echo $result;



Pictorial Presentation:

php function reference: count() function

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Practice here online :

See also

PHP Function Reference

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PHP: Tips of the Day

Filters the collection using the given callback


function tips_reject($items, $func)
  return array_values(array_diff($items, array_filter($items, $func)));

print_r(tips_reject(['Apple', 'Pear', 'Kiwi', 'Banana'], function ($item) {
  return strlen($item) > 4;


    [0] => Pear
    [1] => Kiwi