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ArrayObject::natcasesort

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

ArrayObject::natcasesort — Sort an array using a case insensitive "natural order" algorithm

说明

public ArrayObject::natcasesort(): true

This method is a case insensitive version of ArrayObject::natsort.

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".

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。

更新日志

版本 说明
8.2.0 现在返回类型为 true；之前是 bool。

示例

示例 #1 ArrayObject::natcasesort() example

<?php
$array = array('IMG0.png', 'img12.png', 'img10.png', 'img2.png', 'img1.png', 'IMG3.png');

$arr1 = new ArrayObject($array);
$arr2 = clone $arr1;

$arr1->asort();
echo "Standard sorting\n";
var_dump($arr1);

$arr2->natcasesort();
echo "\nNatural order sorting (case-insensitive)\n";
var_dump($arr2);
?>

以上示例会输出：

Standard sorting
object(ArrayObject)#1 (1) {
  ["storage":"ArrayObject":private]=>
  array(6) {
    [0]=>
    string(8) "IMG0.png"
    [5]=>
    string(8) "IMG3.png"
    [4]=>
    string(8) "img1.png"
    [2]=>
    string(9) "img10.png"
    [1]=>
    string(9) "img12.png"
    [3]=>
    string(8) "img2.png"
  }
}

Natural order sorting (case-insensitive)
object(ArrayObject)#2 (1) {
  ["storage":"ArrayObject":private]=>
  array(6) {
    [0]=>
    string(8) "IMG0.png"
    [4]=>
    string(8) "img1.png"
    [3]=>
    string(8) "img2.png"
    [5]=>
    string(8) "IMG3.png"
    [2]=>
    string(9) "img10.png"
    [1]=>
    string(9) "img12.png"
  }
}

For more information see: Martin Pool's » Natural Order String Comparison page.

参见