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)
|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.
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.
Pictorial Presentation :
<?php $a = 'Language'; $a = 'English'; $a = 'Math'; $a = 'Science'; $result = count($a); echo $result; ?>
Practice here online :