PHP マニュアル: Determines if the set contains all values

説明

public bool Ds\Set::contains(mixed ...$values)

Determines if the set contains all values.

注意:
Values of type object are supported. If an object implements Ds\Hashable, equality will be determined by the object's equals function. If an object does not implement Ds\Hashable, objects must be references to the same instance to be considered equal.

警告

All comparisons are strict (type and value).

パラメータ

values: Values to check.

戻り値

false if any of the provided values are not in the set, true otherwise.

例

例1 Ds\Set::contains example

<?php
$set = new \Ds\Set([1, 2, 3]);

var_dump($set->contains(1));                // true
var_dump($set->contains(1, 2));             // true
var_dump($set->contains(...[1, 2]));        // true

var_dump($set->contains("1"));              // false
var_dump($set->contains(...[1, 2, 3, 4]));  // false

var_dump($set->contains(...[]));            // true
?>

上の例の出力は、たとえば以下のようになります。

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