Frequency of values inside an array

$a1=array("first", "second", "third","fourth","fifth","second","third");
$new_array=array_count_values($a1);

while (list ($key, $val) = each ($new_array)) {
echo "$key -> $val <br>";
}

first -> 1
second -> 2
third -> 2
fourth -> 1
fifth -> 1

array_count_values ($input_array )

Example: Handling Mixed Data Types

$array = [1, "apple", "orange", "apple", 1, 2];
$result = array_count_values($array);
print_r($result);
// Output: Array ( [1] => 2 [apple] => 2 [orange] => 1 [2] => 1 )

Example: Counting Values in a Nested Array

function flatten_array($array) {
    $flat_array = [];
    foreach ($array as $item) {
        if (is_array($item)) {
            $flat_array = array_merge($flat_array, flatten_array($item));
        } else {
            $flat_array[] = $item;
        }
    }
    return $flat_array;
}

$array = [1, [1, 2], "apple", [1, "apple"]];
$flat_array = flatten_array($array);
$result = array_count_values($flat_array);
print_r($result);

// Output: Array ( [1] => 3 [2] => 1 [apple] => 2 )

Subhendu Mohapatra

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