我想按name列值对行数组进行排序，但关键是我想在忽略用户前缀的情况下进行排序。
样品阵列：
$ad_users = [
["name" => "Mr San", "department" => "five"],
["name" => "Mr VSan", "department" => "six"],
["name" => "Mr QSan", "department" => "four"],
["name" => "Sr ASan", "department" => "two"],
["name" => "Dr ASan", "department" => "one"],
["name" => "Dr FSan", "department" => "three"]
];
期望结果：
[
["name" => "Dr ASan", "department" => "one"],
["name" => "Sr ASan", "department" => "two"],
["name" => "Dr FSan", "department" => "three"],
["name" => "Mr QSan", "department" => "four"],
["name" => "Mr San", "department" => "five"],
["name" => "Mr VSan", "department" => "six"]
]
我当前的代码：
for ($x = 0; $x < count($ad_users); $x++) {
$ad_users[$x]['name']= ucwords($ad_users[$x]['name']);
$end = (explode(',', $ad_users[$x]['name']));
$lastname = array_pop($end);
sort($end);
$firstname = implode(" ", $end);
$ad_users[$x]['name']=$lastname." ".$firstname;
}
sort($ad_users);
for ($x = 0; $x < count($ad_users); $x++) {
echo $ad_users[$x]['name']."'n";
}
<?php
uasort($array, function($a, $b) {
$needles = ['Dr.', 'Ms.', ];
$a = trim(str_replace($needles,'', $a['name']));
$b = trim(str_replace($needles,'', $b['name']));
if ($a == $b) {
return 0;
}
return ($a < $b) ? -1 : 1;
});
您在评论中明确表示，您最初的名称为firstname lastname, title，因此您只需要先排序，然后将标题移到前面：
<?php
sort($ad_users);
// I've copied this section as-is, it looks like it could be improved
// but I can't be sure I'm making the correct improvements without seeing
// the original data
for ($x = 0; $x < count($ad_users); $x++) {
$ad_users[$x]['name']= ucwords($ad_users[$x]['name']);
$end = (explode(',', $ad_users[$x]['name']));
$lastname = array_pop($end);
sort($end);
$firstname = implode(" ", $end);
$ad_users[$x]['name']=$lastname." ".$firstname;
}
for ($x = 0; $x < count($ad_users); $x++) {
echo $ad_users[$x]['name']."'n";
}
?>
您应该准备数据（删除所有Dr.、Ms等），然后只对已清理的名称进行排序。
首先：不要对for循环中的常量数组进行计数（）！您使用不存在的分隔符explode（），因此生成的数组只有一个元素，您可以使用array_pop（）删除该元素。然后对（）进行排序并内爆（）一个空数组。所以你会得到一个随机的（在这种情况下是不变的）结果。
请检查http://php.net/usort
您可以将代码更改为
<?php
function sortByOrder($a, $b) {
$prefix = ['Mr.', 'Ms.','Dr.'];
$a = trim(str_replace($prefix,"", $a['name']));
$b = trim(str_replace($prefix,"", $b['name']));
return $a > $b;
}
$myArray = array(
array("name"=>"Dr. bbb"),
array("name"=>"Mr. aaa"),
array("name"=>"Ms. ccc")
);
$abc = usort($myArray, 'sortByOrder');
print_r($myArray);
?>
查看此处：https://eval.in/569467
输出为：
Array
(
[0] => Array
(
[name] => Mr. aaa
)
[1] => Array
(
[name] => Dr. bbb
)
[2] => Array
(
[name] => Ms. ccc
)
)
usort()具有更昂贵的时间复杂性，并且在每次迭代中需要加倍的函数调用。相反，我建议使用array_multisort()，并准备一个具有最少函数调用的排序数组。
隔离name列的值，然后修剪每个值的前缀，然后比较这些字符串。之后，您可以通过对整行进行排序来有效地对前缀进行排序。
代码：（演示）
array_multisort(
preg_replace('/^[^ ]+ /', '', array_column($data, 'name')),
$data
);