Php count keys in multidimensional array

(PHP 4, PHP 5, PHP 7, PHP 8)

array_count_values — Counts all the values of an array

Description

array_count_values(array $array): array

Parameters

The array of values to count

Return Values

Returns an associative array of values from array as keys and their count as value.

Errors/Exceptions

Throws E_WARNING for every element which is not string or int.

Examples

Example #1 array_count_values() example

$array = array(1, "hello", 1, "world", "hello");
print_r(array_count_values($array));
?>

The above example will output:

Array
(
    [1] => 2
    [hello] => 2
    [world] => 1
)

See Also

• count() - Counts all elements in an array or in a Countable object
• array_unique() - Removes duplicate values from an array
• array_values() - Return all the values of an array
• count_chars() - Return information about characters used in a string

sergolucky96 at gmail dot com ¶

4 years ago

Simple way to find number of items with specific values in multidimensional array:

$list

szczepan.krolgmail.c0m ¶

12 years ago

Here is a Version with one or more arrays, which have similar values in it:
Use $lower=true/false to ignore/set case Sensitiv.

$ar1

anvil_sa at NOSPAMNO dot hotmail dot com ¶

2 years ago

Based on sergolucky96 suggestion
Simple way to find number of items with specific *boolean* values in multidimensional array:

$list

Dominic Vonk ¶

8 years ago

The case-insensitive version:

function array_count_values_ci($array) {
    $newArray = array();
    foreach ($array as $values) {
        if (!array_key_exists(strtolower($values), $newArray)) {
            $newArray[strtolower($values)] = 0;
        }
        $newArray[strtolower($values)] += 1;
    }
    return $newArray;
}
?>

rabies dot dostojevski at gmail dot com ¶

15 years ago

I couldn't find a function for counting the values with case-insensitive matching, so I wrote a quick and dirty solution myself:

function array_icount_values($array) {
    $ret_array = array();
    foreach($array as $value) {
        foreach($ret_array as $key2 => $value2) {
            if(strtolower($key2) == strtolower($value)) {
                $ret_array[$key2]++;
                continue 2;
            }
        }
        $ret_array[$value] = 1;
    }
    return $ret_array;
}$ar = array('J. Karjalainen', 'J. Karjalainen', 60, '60', 'J. Karjalainen', 'j. karjalainen', 'Fastway', 'FASTWAY', 'Fastway', 'fastway', 'YUP');
$ar2 = array_count_values($ar); // Normal matching
$ar = array_icount_values($ar); // Case-insensitive matching
print_r($ar2);
print_r($ar);
?>

This prints:

Array
(
    [J. Karjalainen] => 3
    [60] => 2
    [j. karjalainen] => 1
    [Fastway] => 2
    [FASTWAY] => 1
    [fastway] => 1
    [YUP] => 1
)
Array
(
    [J. Karjalainen] => 4
    [60] => 2
    [Fastway] => 4
    [YUP] => 1
)

I don't know how efficient it is, but it seems to work. Needed this function in one of my scripts and thought I would share it.

pmarcIatIgeneticsImedIharvardIedu ¶

19 years ago

array_count_values function does not work on multidimentional arrays.
If $score[][] is a bidimentional array, the command
"array_count_values ($score)" return the error message "Warning: Can only count STRING and INTEGER values!".