countCount all elements in an array, or something in an object
&reftitle.description;
intcountmixedarray_or_countableintmodeCOUNT_NORMAL
Counts all elements in an array, or something in an object.
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.
Please see the Array
section of the manual for a detailed explanation of how arrays
are implemented and used in PHP.
&reftitle.parameters;
array_or_countable
An array or Countable object.
mode
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.
count can detect recursion to avoid an infinite
loop, but will emit an E_WARNING every time it
does (in case the array contains itself more than once) and return a
count higher than may be expected.
&reftitle.returnvalues;
Returns the number of elements in array_or_countable.
When the parameter is neither an array nor an object with
implemented Countable interface,
1 will be returned.
There is one exception, if array_or_countable is &null;,
0 will be returned.
&reftitle.examples;
count example
]]>
&example.outputs;
Recursive count example
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
?>
]]>
&reftitle.changelog;
&Version;&Description;7.2.0count will now yield a warning on invalid countable types
passed to the array_or_countable parameter.
&reftitle.seealso;
is_arrayissetemptystrlen