Description
int
count ( mixed var)
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).
| Warning |
count() may return 0 for a variable that
isn't set, but it may also return 0 for a variable that has
been initialized with an empty array. Use
isset() to test if a variable is set.
|
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 $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; |
|
See also is_array(),
isset(), and
strlen().
