【DAY.1】PHP如何得到陣列最後元素的key?
阿新 • • 發佈：2019-01-21
1.array_keys(end($arr))
$array = array('one'=>1,'two'=>2,'three'=>3,'four'=>4,);$arr = array_keys($array);var_dump(end($arr));
2.array_pop(end($arr))
$array = array('one'=>1,'two'=>2,'three'=>3,'four'=>4,);$arr = array_keys($array);var_dump(array_pop($arr));
3.foreach()
$array = array('one'=>1,'two'=>2,'three'=>3,'four'=>4,);foreach($array as $key => $value){$temp = $key;}var_dump($temp)
4.array_slice
$array = array('one'=>1,'two'=>2,'three'=>3,'four'=>4,);$arr = array_slice($array,-1,1,true);var_dump(key($arr));