What's the best way to determine the first key in a possibly associative array? My first thought it to just foreach the array and then immediately breaking it, like this:
foreach ($an_array as $key => $val) break;
Thus having $key contain the first key, but this seems inefficient. Does anyone have a better solution?
转载于:https://stackoverflow.com/questions/1028668/get-first-key-in-a-possibly-associative-array