Question

如何使用PHP基于name的前缀编号对以下数组进行排序，并将输出生成为

    1-First
    2-Capico
    4-Apple
    10-Zebra



$array  = Array ( [0] => stdClass Object ( [term_id] => 6 [name] => 1-First [slug] => aaa-a [term_group] => 0 [term_taxonomy_id] => 6 [taxonomy] => category [description] => [parent] => 4 [count] => 2 [cat_ID] => 6 [category_count] => 2 [category_description] => [cat_name] => 1-First [category_nicename] => aaa-a [category_parent] => 4 ) 
        [1] => stdClass Object ( [term_id] => 9 [name] => 10-Zebra [slug] => aaa-f [term_group] => 0 [term_taxonomy_id] => 9 [taxonomy] => category [description] => [parent] => 4 [count] => 1 [cat_ID] => 9 [category_count] => 1 [category_description] => [cat_name] => 10-Zebra [category_nicename] => aaa-f [category_parent] => 4 ) 
        [2] => stdClass Object ( [term_id] => 8 [name] => 2-Capico [slug] => aaa-c [term_group] => 0 [term_taxonomy_id] => 8 [taxonomy] => category [description] => [parent] => 4 [count] => 1 [cat_ID] => 8 [category_count] => 1 [category_description] => [cat_name] => 2-Capico [category_nicename] => aaa-c [category_parent] => 4 ) 
        [3] => stdClass Object ( [term_id] => 7 [name] => 4-Apple [slug] => aaa-b [term_group] => 0 [term_taxonomy_id] => 7 [taxonomy] => category [description] => [parent] => 4 [count] => 1 [cat_ID] => 7 [category_count] => 1 [category_description] => [cat_name] => 4-Apple [category_nicename] => aaa-b [category_parent] => 4 ) )

尝试使用

sort($array,SORT_NUMERIC);
foreach ( $array as $single ) {
echo $single->name;
}

但显示输出为

4-Apple
2-Capico
10-Zebra
1-First

Answer 1

从PHP 5.3开始，您可以将usort()与anonymous function一起使用。在旧版本中，您可以使用常规比较功能，如手册中所示。

usort($array, function ($a, $b) {
    //saving values converted to integer
    $intAname=(int) $a->name;
    $intBname=(int) $b->name;

    //if they are equal, do string comparison
    if ($intAname == $intBname) {
        return strcmp($a->name, $b->name);
    }

    return ($intAname < $intBname) ? -1 : 1;
});

排序顺序很好，因为您的name字符串以数字开头，因此PHP会parse these variables as numbers。

UPDATE：按@binaryLV的建议添加了整数转换，并解决了@konforce（1-foo and 1-bar）提到的strcmp()问题。

Answer 2

usort($array, function($a, $b) 
    { 
        return strnatcasecmp($a->name, $b->name); 
    });`

Answer 3

以数字方式排序：

usort($data, function($a, $b) { return $a->name - $b->name; });

在PHP中使用最小循环对多维数组进行排序

3 个答案: