ArrayObject::natsort
(PHP 5 >= 5.2.0, PHP 7, PHP 8)
ArrayObject::natsort — Sort entries using a "natural order" algorithm
说明
This method implements a sort algorithm that orders alphanumeric strings in the way a human being would while maintaining key/value associations. This is described as a "natural ordering". An example of the difference between this algorithm and the regular computer string sorting algorithms (used in ArrayObject::asort) method can be seen in the example below.
注意:
如果两个成员完全相同，那么它们将保持原来的顺序。 在 PHP 8.0.0 之前，它们在排序数组中的相对顺序是未定义的。
参数
此函数没有参数。
返回值
没有返回值。
示例
示例 #1 ArrayObject::natsort() example
<?php
$array = array("img12.png", "img10.png", "img2.png", "img1.png");
$arr1 = new ArrayObject($array);
$arr2 = clone $arr1;
$arr1->asort();
echo "Standard sorting\n";
var_dump($arr1);
$arr2->natsort();
echo "\nNatural order sorting\n";
var_dump($arr2);
?>以上示例会输出：
Standard sorting
object(ArrayObject)#1 (1) {
["storage":"ArrayObject":private]=>
array(4) {
[3]=>
string(8) "img1.png"
[1]=>
string(9) "img10.png"
[0]=>
string(9) "img12.png"
[2]=>
string(8) "img2.png"
}
}
Natural order sorting
object(ArrayObject)#2 (1) {
["storage":"ArrayObject":private]=>
array(4) {
[3]=>
string(8) "img1.png"
[2]=>
string(8) "img2.png"
[1]=>
string(9) "img10.png"
[0]=>
string(9) "img12.png"
}
}
For more information see: Martin Pool's » Natural Order String Comparison page.
参见
- ArrayObject::asort() - Sort the entries by value
- ArrayObject::ksort() - Sort the entries by key
- ArrayObject::natcasesort() - Sort an array using a case insensitive "natural order" algorithm
- ArrayObject::uasort() - Sort the entries with a user-defined comparison function and maintain key association
- ArrayObject::uksort() - Sort the entries by keys using a user-defined comparison function
- natsort() - 用“自然排序”算法对数组排序
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