PHP我有两个数组,我想从数组1中提取项目,如果它不在数组2中

Question

就像标题所说的那样,我有两个数组,我只想从第一个数组中获取所有内容,而第一个数组中的数据并不在第二个数组中.我该怎么做呢？

Answer 1

用途array_diff:

$array1 = array("a" => "green", "red", "blue", "red");
$array2 = array("b" => "green", "yellow", "red");
$result = array_diff($array1, $array2);

print_r($result);

结果:

Array
(
    [1] => blue
)

看到它在线工作:ideone