我如何排序这个对象数组的一个字段，如名称或计数?
Array
(
[0] => stdClass Object
(
[ID] => 1
[name] => Mary Jane
[count] => 420
)
[1] => stdClass Object
(
[ID] => 2
[name] => Johnny
[count] => 234
)
[2] => stdClass Object
(
[ID] => 3
[name] => Kathy
[count] => 4354
)
....
当前回答
你可以像这样使用我们
如果你想按数字排序:
function cmp($a, $b)
{
if ($a == $b) {
return 0;
}
return ($a < $b) ? -1 : 1;
}
$a = array(3, 2, 5, 6, 1);
usort($a, "cmp");
或Abc char:
function cmp($a, $b)
{
return strcmp($a["fruit"], $b["fruit"]);
}
$fruits[0]["fruit"] = "lemons";
$fruits[1]["fruit"] = "apples";
$fruits[2]["fruit"] = "grapes";
usort($fruits, "cmp");
查看更多信息:https://www.php.net/manual/en/function.usort.php
其他回答
用这个……
$array_list = [
"Apple" => 2,
"Pear" => 1,
"Orange" => 5,
"Lemon" => 1,
"Strawberry" => 2,
"Banana" => 3
];
function cmp($a, $b) {
return $b - $a;
}
$ao = new ArrayObject($object);
$ao->uasort('cmp');
print_r(json_encode($ao));
再见! !
你可以使用Nspl中的排序函数:
use function \nspl\a\sorted;
use function \nspl\op\propertyGetter;
use function \nspl\op\methodCaller;
// Sort by property value
$sortedByCount = sorted($objects, propertyGetter('count'));
// Or sort by result of method call
$sortedByName = sorted($objects, methodCaller('getName'));
如果你正在使用PHP oop，你可能需要更改为:
public static function cmp($a, $b)
{
return strcmp($a->name, $b->name);
}
//in this case FUNCTION_NAME would be cmp
usort($your_data, array('YOUR_CLASS_NAME','FUNCTION_NAME'));
这是一个实用类
class Util
{
public static function sortArrayByName(&$arrayToSort, $meta) {
usort($arrayToSort, function($a, $b) use ($meta) {
return strcmp($a[$meta], $b[$meta]);
});
}
}
叫它:
Util::sortArrayByName($array, "array_property_name");
你可以像这样使用我们
如果你想按数字排序:
function cmp($a, $b)
{
if ($a == $b) {
return 0;
}
return ($a < $b) ? -1 : 1;
}
$a = array(3, 2, 5, 6, 1);
usort($a, "cmp");
或Abc char:
function cmp($a, $b)
{
return strcmp($a["fruit"], $b["fruit"]);
}
$fruits[0]["fruit"] = "lemons";
$fruits[1]["fruit"] = "apples";
$fruits[2]["fruit"] = "grapes";
usort($fruits, "cmp");
查看更多信息:https://www.php.net/manual/en/function.usort.php
