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'));
其他回答
如果你想对日期排序
usort($threads,function($first,$second){
return strtotime($first->dateandtime) < strtotime($second->dateandtime);
});
如果你想对整数值进行排序:
// Desc sort
usort($array,function($first,$second){
return $first->number < $second->number;
});
// Asc sort
usort($array,function($first,$second){
return $first->number > $second->number;
});
更新 使用字符串时不要忘记转换为相同的寄存器(上寄存器或下寄存器)
// Desc sort
usort($array,function($first,$second){
return strtolower($first->text) < strtolower($second->text);
});
// Asc sort
usort($array,function($first,$second){
return strtolower($first->text) > strtolower($second->text);
});
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! !
$array[0] = array('key_a' => 'z', 'key_b' => 'c');
$array[1] = array('key_a' => 'x', 'key_b' => 'b');
$array[2] = array('key_a' => 'y', 'key_b' => 'a');
function build_sorter($key) {
return function ($a, $b) use ($key) {
return strnatcmp($a[$key], $b[$key]);
};
}
usort($array, build_sorter('key_b'));
如果你正在使用PHP oop，你可能需要更改为:
public static function cmp($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'));
