how to change the following array
array(2) {
[0]=>
array(2) {
[0]=>
string(20) "18052910110100956524"
[1]=>
string(12) "102101016056"
}
[1]=>
array(1) {
[0]=>
string(12) "101101502347"
}
}merge into
array(2) {
[0]=>
string(20) "18052910110100956524"
[1]=>
string(12) "102101016056"
[2]=>
string(12) "101101502347"
}$arr = [
["18052910110100956524", "102101016056"],
["101101502347"]
];
$result = array_merge(...$arr);
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