我如何根据数组中指定的字母有效地对具有百万值的数组进行排序,同时最大限度地减少时间浪费。$letters=array("а","б","в","г","ғ","д","е","ё","ҷ","ж","з","и","ӣ","й","к","қ","л","м","н","о","п","р","с","т","у","ӯ","ф","х","ҳ","ч","ш","ъ","э","ю","я");按特定键对数组进行排序的简单函数。维护索引关联。此函数还对数组进行排序,但不是按我的字母表排序,而是按英文字母表排序(在英文字母中效果更好)。0){foreach($arrayas$k=>$v