array_all

    (PHP 8 >= 8.4.0)

    array_all — Checks if all array elements satisfy a callback function

    説明

    array_all(array $array, callable $callback): mixed

    array_all() returns true, if the given callback returns true for all elements. Otherwise the function returns false.

    パラメータ

    array
    The array that should be searched.
    callback

    The callback function to call to check each element, which must be

    callback(mixed $value, mixed $key): bool
    If this function returns false, false is returned from array_all() and the callback will not be called for further elements.

    戻り値

    The function returns true, if callback returns true for all elements. Otherwise the function returns false.

    例

    例1 array_all() example

    <?php
    $array     = [
    'a' => 'dog',
    'b' => 'cat',
    'c' => 'cow',
    'd' => 'duck',
    'e' => 'goose',
    'f' => 'elephant'
    ];

    // Check, if all animal names are shorter than 12 letters.
    var_dump(array_all($array, function (string $value) {
    return     strlen($value) < 12;
    }));

    // Check, if all animal names are longer than 5 letters.
    var_dump(array_all($array, function (string $value) {
    return     strlen($value) > 5;
    }));

    // Check, if all array keys are strings.
    var_dump(array_all($array, function (string $value, $key) {
    return     is_string($key);
    }));
    ?>

    上の例の出力は以下となります。

    bool(true)
bool(false)
bool(true)

    参考

    • array_any() - Checks if at least one array element satisfies a callback function
    • array_filter() - コールバック関数を使用して、配列の要素をフィルタリングする
    • array_find() - Returns the first element satisfying a callback function
    • array_find_key() - Returns the key of the first element satisfying a callback function

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