使用宇宙飞船运算符按两个参数对数组进行排序

usort array by two parameters using spaceship operator

有没有一种更紧凑的方法可以通过 two parameters/fields 对 PHP ≥7.0 的数组进行排序(使用 spaceship operator <=>) ?

现在我的技巧是先按第二个参数排序,然后再按第一个参数排序:

// Sort by second parameter title
usort($products, function ($a, $b) {
    return $a['title'] <=> $b['title']; // string
});

// Sort by first parameter brand_order
usort($products, function ($a, $b) {
    return $a['brand_order'] <=> $b['brand_order']; // numeric
});

这给了我想要的结果;产品首先按品牌订购,然后按名称订购。

我只是想知道他们是否是一个 usort 调用的方法。


这里是我的问题代码片段。这个例子可以测试here.

<?php
        
<!-- Example array -->
$products = array();

$products[] = array("title" => "Title A",  
              "brand_name" => "Brand B",
              "brand_order" => 1);
$products[] = array("title" => "Title C",  
              "brand_name" => "Brand A",
              "brand_order" => 0);
$products[] = array("title" => "Title E",  
              "brand_name" => "Brand A",
              "brand_order" => 0);
$products[] = array("title" => "Title D",  
              "brand_name" => "Brand B",
              "brand_order" => 1);

// Sort by second parameter title
usort($products, function ($a, $b) {
    return $a['title'] <=> $b['title']; // string
});

// Sort by first parameter brand_order
usort($products, function ($a, $b) {
    return $a['brand_order'] <=> $b['brand_order']; // numeric
});

// Output
foreach( $products as $value ){
    echo $value['brand_name']." — ".$value['title']."\n";
}

?>

usort($products, function ($a, $b) {
    if ( $a['brand_order'] == $b["brand_order"] ) {  //brand_order are same
       return $a['title'] <=> $b['title']; //sort by title
    }
    return $a['brand_order'] <=> $b['brand_order']; //else sort by brand_order
});

Test here