array_count_values

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

    array_count_values — Counts the occurrences of each distinct value in an array

    Опис

    array_count_values(array $array): array

    array_count_values() returns an array using the values of array (which must be ints or strings) as keys and their frequency in array as values.

    Параметри

    array

    The array of values to count

    Значення, що повертаються

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

    Помилки/виключення

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

    Приклади

    Приклад #1 array_count_values() example

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

    Поданий вище приклад виведе:

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

    Прогляньте також

    • count() - Підраховує кількість елементів масиву або об’єкту Countable
    • 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

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    User Contributed Notes 3 notes

    up
    27
    sergolucky96 at gmail dot com
    6 years ago
    Simple way to find number of items with specific values in multidimensional array:

    <?php

    $list     = [
    [    'id' => 1, 'userId' => 5],
    [    'id' => 2, 'userId' => 5],
    [    'id' => 3, 'userId' => 6],
    ];
    $userId = 5;

    echo     array_count_values(array_column($list, 'userId'))[$userId]; // outputs: 2
    ?>
    up
    7
    rabies dot dostojevski at gmail dot com
    17 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:

    <pre><?php
    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);
    ?></pre>

    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.
    up
    6
    szczepan.krolgmail.c0m
    14 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.

    <?php

    $ar1    [] = array("red","green","yellow","blue");
    $ar1[] = array("green","yellow","brown","red","white","yellow");
    $ar1[] = array("red","green","brown","blue","black","yellow");
    #$ar1= array("red","green","brown","blue","black","red","green"); // Possible with one or multiple Array

    $res = array_icount_values ($ar1);
    print_r($res);

    function     array_icount_values($arr,$lower=true) {
    $arr2=array();
    if(!    is_array($arr['0'])){$arr=array($arr);}
    foreach(    $arr as $k=> $v){
    foreach(    $v as $v2){
    if(    $lower==true) {$v2=strtolower($v2);}
    if(!isset(    $arr2[$v2])){
    $arr2[$v2]=1;
    }else{
    $arr2[$v2]++;
    }
    }
    }
    return     $arr2;
    }
    /*
    Will print:
    Array
    (
    [red] => 3
    [green] => 3
    [yellow] => 4
    [blue] => 2
    [brown] => 2
    [white] => 1
    [black] => 1
    )
    */
    ?>
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