array_count_values of a multi dimensional array?

✔ Recommended Answer

Using the variable $arr for your array, you could do this:

$out = array();foreach ($arr as $key => $value){    foreach ($value as $key2 => $value2){        $index = $key2.'-'.$value2;        if (array_key_exists($index, $out)){            $out[$index]++;        } else {            $out[$index] = 1;        }    }}var_dump($out);

Output:

Array(    [07/11-134] => 2    [07/11-145] => 2    [07/12-134] => 1    [07/12-99] => 1)

Here's another version that produces it as a multidimensional array:

$out = array();foreach ($arr as $key => $value){    foreach ($value as $key2 => $value2){        if (array_key_exists($key2, $out) && array_key_exists($value2, $out[$key2])){            $out[$key2][$value2]++;        } else {            $out[$key2][$value2] = 1;        }    }}

Output:

Array(    [07/11] => Array        (            [134] => 2            [145] => 2        )    [07/12] => Array        (            [134] => 1            [99] => 1        ))

Source: stackoverflow.com

Answered By: Expedito

Method #2

The array_count_values() function in PHP counts the frequency of each value in a one-dimensional array. If you want to count the frequency of values in a multi-dimensional array, you can use a loop to iterate over each element in the array and then use the array_column() and array_count_values() functions to count the frequency of each value.

Here's an example code snippet that demonstrates this approach:

php
// Example multi-dimensional array
$array = array(
    array('a', 'b', 'c'),
    array('b', 'c', 'd'),
    array('c', 'd', 'e')
);

// Flatten the array using array_column() and count the frequency of each value using array_count_values()
$flat_array = array_column($array, null);
$counts = array_count_values($flat_array);

// Print the frequency of each value
foreach ($counts as $value => $count) {
    echo "$value occurs $count times\n";
}

In this example, we first use array_column() to flatten the multi-dimensional array into a one-dimensional array. We then use array_count_values() to count the frequency of each value in the flattened array. Finally, we loop over the resulting counts array to print out the frequency of each value.