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

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I think you meant the keys from array1 would be 1 and 2. –  Pé de Leão Aug 13 at 14:40
 
Yes, thanks, fixed it. –  Ayen Aug 13 at 15:02

3 Answers

up vote 2 down vote accepted

Compare:

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

and

$rgResult = array_keys(array_intersect($array2, $array1));
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up vote 2 down vote

You're looking for array_intersect

array_keys(array_intersect($array1, $array2));
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up vote 0 down vote 
array_keys($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);
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