按字母顺序排列字母数字字母

Question

我有一个PHP索引数组，只有字母随机，我想按升序排序这个数组，也想避免重复。 e.g。

$letters = array("b","d","g","h","v","a","c","a");

我想要这样

$letters = array("a","b","c","d","g","h","v");

我如何特别执行此方案？

Answer 1

使用sort()对其进行排序，并使用array_unique()删除重复的值。

sort($letters);
$letters = array_unique($letters);

Answer 2

您可以使用排序功能。排序函数接受参数作为数组并按升序排序。请尝试以下代码

$letters = array("b","d","g","h","v","a","c","a");
$letters = array_unique($letters);
sort($letters);
print_r($letters);