Count array keys

Question

Array
(
[0] => Array
    (
        [name] => WWW
    )

[1] => Array
    (
        [name] => Hi
    )

[2] => Array
    (
        [name] => Hello
    )

[3] => Array
    (
        [name] => World
    )

)

I have the above array and I want to count the number of keys.

When using the following code

$temp = array_keys($array);
echo $temp;

the result is 2 instead of 4 (0,1,2,3). What I'm doing wrong ?

Just count the array itself: count($array). There's always the same amount of keys as there are values! — Joseph Silber
– Joseph Silber, Commented Jan 3, 2014 at 16:35
array_keys returns an array. So how can the result be '2'?? — jszobody
– jszobody, Commented Jan 3, 2014 at 16:36
The result of echo $temp; should be 'Array', since array_keys returns an array of the keys. — gen_Eric
– gen_Eric, Commented Jan 3, 2014 at 16:37
@JosephSilber with the mess of bad answers below, you need to just post yours so we can upvote it =) — jszobody
– jszobody, Commented Jan 3, 2014 at 16:41

Teknotica · Accepted Answer · 2014-01-03 16:40:43Z

4

You need to count the array in order to get a number:

  $arr = array
    (
        "0" => array
        (
            "name" =>"WWW"
        ),

    "1" => array
    (
        "name" => "Hi"
    ),

    "2" => array
    (
        "name" => "Hello"
    ),

    "3" => array
    (
        "name" => "World"
    )

    );

    $keys_count = count($arr);
    echo $keys_count;

answered Jan 3, 2014 at 16:40

Teknotica

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Joseph Silber · Accepted Answer · 2014-01-03 16:42:34Z

4

Just count the array itself: count($array).

There's always the same amount of keys as there are values!

answered Jan 3, 2014 at 16:42

Joseph Silber

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Comments

Rafael · Accepted Answer · 2014-01-03 16:54:24Z

-1

Very simple buddy. Look this:

 $array = array(0 => 100, "color" => "red");
 print_r(count($array));

php.net help you for all! ;)

edited Jan 3, 2014 at 16:54

answered Jan 3, 2014 at 16:39

Rafael

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2 Comments

gen_Eric Over a year ago

Even simpler echo count($array);. Done.

jszobody Over a year ago

Using array_keys is unnecessary. So is using print_r on an integer.

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