I have an array ($skus), which looks like this;
$skus[0] = "hello";
$skus[1] = "world";
$skus[2] = "sky";
$skus[3] = "is";
$skus[4] = "blue";
My question is, how can I get a subset of this array based on another array, i.e. the subset array is;
$words = array(0,2,4);
which will return to me an array with ["hello", "sky", "blue"], i.e.
$return[0] = "hello";
$return[1] = "sky";
$return[2] = "blue";
You might use a for loop and check if the index from $words exists in $skus:
$skus = [
"Hello",
"world",
"sky",
"is",
"blue",
];
$words = array(0,2,4);
$result = [];
for ($i = 0; $i < count($words); $i++) {
if (isset($skus[$words[$i]])) {
$result[$i] = $skus[$words[$i]];
}
}
print_r($result);
Result
Array
(
[0] => Hello
[1] => sky
[2] => blue
)
You can use array_intersect_key() with array_flip():
<?
$skus[0] = "hello";
$skus[1] = "world";
$skus[2] = "sky";
$skus[3] = "is";
$skus[4] = "blue";
$words = array(0,2,4);
$result = array_intersect_key($skus, array_flip($words));
$setOrder = array_values($result); // to re order
echo "<pre>";
print_r($setOrder);
?>
Result:
Array
(
[0] => hello
[1] => sky
[2] => blue
)
You can also use array_values() to reset the key order.
