Ds\Set::contains
(PECL ds >= 1.0.0)
Ds\Set::contains — Determines if the set contains all values
说明
public Ds\Set::contains(mixed...$values): bool
Determines if the set contains all values.
警告注意:
Values of type object are supported. If an object implements Ds\Hashable, equality will be determined by the object's
equalsfunction. If an object does not implement Ds\Hashable, objects must be references to the same instance to be considered equal.
All comparisons are strict (type and value).
参数
values
Values to check.
返回值
false if any of the provided values are not in the
set, true otherwise.
范例
示例 #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
?>
以上例程的输出类似于：
bool(true) bool(true) bool(true) bool(false) bool(false) bool(true)
User Contributed Notes
There are no user contributed notes for this page.官方地址：https://www.php.net/manual/en/ds-set.contains.php