PHP-更改字符排序顺序，例如；a「&燃气轮机&引用；{"；=True

我试图定制PHP的

usort

函数来更改字符排序顺序

目前，只有“

*

”符号字符等同于具有小于字母字符的值，例如“

a

”，即“

”*“

。其他符号，例如“

{

”，具有大于字母的值，例如“

a

”，即

“{a”=FALSE

我想进行排序，使值“

{*}

”位于已排序数组的顶部，就像值是“

*

”。这是我当前使用的函数，用于根据对象的多个属性对对象数组进行排序。[属性：这是

usort

上的代码的修改版本]

---

如果一个

usort

，它按照您定义的顺序对某些字符进行优先级排序，然后使用常规的

strcmp

大概是这样的：

<?php

$list = [ 'abc',
      '{a}',
      '*',
      '{*}',
      '{abc',
      '}a',
    ]; // An array of strings to sort

$customOrderPrioritized = ['{','*','}']; // Add any characters here to prioritize them, in the order they appear in this array

function ustrcmp($a, $b, $customOrderPrioritized) {
    if ($a === $b) return -1; // same, doesn't matter who goes first

    $n = min(strlen($a), strlen($b)); // compare up to the length of the shortest string
    for ($i = 0; $i < $n; $i++) {
        if ($a[$i] === $b[$i]) continue; // matching character, continue to compare next

        $a_prio = in_array($a[$i], $customOrderPrioritized);
        $b_prio = in_array($b[$i], $customOrderPrioritized);

        // If either one has a prioritized char...
        if ($a_prio || $b_prio) {
            if ($a_prio && $b_prio) {
                // Both are prioritized, check which one is first...
                return array_search($a[$i], $customOrderPrioritized) <= array_search($b[$i], $customOrderPrioritized) ? -1 : 1;
            } elseif ($a_prio) {
                return -1; // a < b
            } else { // must be $b_prio
                return +1; // b > a
            }
        }
        return strcmp($a[i], $b[$i]); // compare single character
    }
    // if they have identical beginning, shortest should be first
    return strlen($a) <= strlen($b) ? -1 : +1;
}

usort(
    $list, 
    function($a, $b) use ($customOrderPrioritized){
        return ustrcmp($a, $b, $customOrderPrioritized);        
    }
); // run custom comparison function, pass in $customOrderPrioritized (or make it global)

print_r($list); // print the list

/* The sorted array should look like:
Array
(
    [0] => {*}
    [1] => {a}
    [2] => {abc
    [3] => *
    [4] => }a
    [5] => abc
)
*/

<?php

$list = [ 'abc',
      '{a}',
      '*',
      '{*}',
      '{abc',
      '}a',
    ]; // An array of strings to sort

$customOrderPrioritized = ['{','*','}']; // Add any characters here to prioritize them, in the order they appear in this array

function ustrcmp($a, $b, $customOrderPrioritized) {
    if ($a === $b) return -1; // same, doesn't matter who goes first

    $n = min(strlen($a), strlen($b)); // compare up to the length of the shortest string
    for ($i = 0; $i < $n; $i++) {
        if ($a[$i] === $b[$i]) continue; // matching character, continue to compare next

        $a_prio = in_array($a[$i], $customOrderPrioritized);
        $b_prio = in_array($b[$i], $customOrderPrioritized);

        // If either one has a prioritized char...
        if ($a_prio || $b_prio) {
            if ($a_prio && $b_prio) {
                // Both are prioritized, check which one is first...
                return array_search($a[$i], $customOrderPrioritized) <= array_search($b[$i], $customOrderPrioritized) ? -1 : 1;
            } elseif ($a_prio) {
                return -1; // a < b
            } else { // must be $b_prio
                return +1; // b > a
            }
        }
        return strcmp($a[i], $b[$i]); // compare single character
    }
    // if they have identical beginning, shortest should be first
    return strlen($a) <= strlen($b) ? -1 : +1;
}

usort(
    $list, 
    function($a, $b) use ($customOrderPrioritized){
        return ustrcmp($a, $b, $customOrderPrioritized);        
    }
); // run custom comparison function, pass in $customOrderPrioritized (or make it global)

print_r($list); // print the list

/* The sorted array should look like:
Array
(
    [0] => {*}
    [1] => {a}
    [2] => {abc
    [3] => *
    [4] => }a
    [5] => abc
)
*/