Example
Given nums = [2, 7, 11, 15], target = 9,
Because nums[0] + nums[1] = 2 + 7 = 9,
return [0, 1]
<?php
print_r(test([11,2,7,15], 9));
function test($nums, $target) {
$lookup[$nums[0]] = 1;
foreach ($nums as $key=>$num) {
// code...
if (in_array($target - $num, $nums)) {
// code...
return [array_search($target-$num,$nums),$key];
}else {
$lookup[$num] = $key;
}
}
}
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