count
(PHP 3, PHP 4> = 4.0.0) count - count the number of elements in variables
description
INT Count (Mixed Var)
Returns a variable VAR element, the most representative is an array (other types have only one element).
If this variable VAR is not an array, it will return 1 (except: count (null) is equivalent to 0).
WARNING count () may return 0 for a change in which no settings, but it can also return 0 for the initialized empty array. If you want to check if a variable is set, use the iSSet () function.
For the implementation of the array, see the array section in the manual in the use of PHP in arrays.
Example 1. COUNT ()
$ 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;
Note: SIZEOF () function is count () an alias
See: sizeof (), isset (), and IS_ARRAY ().
