PHP从一个相交值数组中获取键

Question

in php, if I have two arrays:

array1 = array('a', 'b', 'c');
array2 = array('b', 'c');

Is there a function of combination of functions that will compare the two arrays' values and return the keys from 1 array of the intersection?

If wanting the key s from array1 , they would be 1 and 2 If wanting the key s from array2 , they would be 0 and 1

Answer 1

Compare:

$rgResult = array_keys(array_intersect($array1, $array2));

and

$rgResult = array_keys(array_intersect($array2, $array1));

Answer 2

你正在寻找array_intersect

array_keys(array_intersect($array1, $array2));

Answer 3

array_keys($array1 = array('a', 'b', 'c'); $array2 = array('b', 'c');

$intersection = array_intersect($array1, $array2);

$keys = array();
foreach($intersection as $i){
    $keys[]= array_search($i,$array1);
}
print_r($keys);