PHP-检查所有数组值是否都存在于另一个数组值中

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这个问题已经在这里有了答案：            >            php check if array contains all array values from another array                                    5个
我有一个要与另一个数组匹配的数组,第一个数组内的所有值都必须在第二个数组内,因此,如果第二个数组长度小于第一个数组长度,它将自动变为false.例如：

$products = array("soap","milk","book");
$availableProducts = array("soap","tea","oil","milk","book");
$this->matchArray($products,$availableProducts); //return true because  all $products value inside $availableProducts value too

$products = array("soap","milk","book");
$availableProducts = array("milk","tea","book","soap","oil");
$this->matchArray($products,$availableProducts); //return true because  all $products value inside $availableProducts value too

$products = array("soap","milk","book");
$availableProducts = array("soap","tea","oil","salt","paper");
$this->matchArray($products,$availableProducts); //return false because  only one of $products value inside $availableProducts value

$products = array("soap","milk","book");
$availableProducts = array("milk","book");
$this->matchArray($products,$availableProducts); //return false because  only two of $products value inside $availableProducts value 

解决方法:

您可以使用array_diff()

<?PHP

$products = array("soap","milk","book");
$availableProducts = array("soap","tea","oil","milk","book");

$difference = array_diff($products,$availableProducts);

if(count($differencE)==0){

  echo "all products availabale";
}else{

  echo implode(',',$differencE) ." are not available";
}

输出：-

> https://eval.in/989587
> https://eval.in/989588
> https://eval.in/989593
> https://eval.in/989596

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