Definition and Usage
定义和用法

The natcasesort() function sorts an array by using a "natural order" algorithm. The values keep their original keys.
natcasesort()函数的作用是：用“自然排序[natural order]”算法对数组进行不区分大小写字母的排序。数组内所有值的键保持不变。

In a natural algorithm, the number 2 is less than the number 10. In computer sorting, 10 is less than 2, because the first number in "10" is less than 2.
在“自然运算法则[natural algorithm]”中，“2”小于“10”；在计算机排序运算法则中，“10”是小于“2”的，因为“10”的第一个数字“1”小于“2”。

This function is case-insensitive.
这个函数不区分大小写[case-insensitive]。

This function returns TRUE on success, or FALSE on failure.
如果成功，则该函数返回True；失败则返回False。

Syntax
语法

natcasesort(array)

Example
案例

<?php
$temp_files = array("temp15.txt","Temp10.txt",
"temp1.txt","Temp22.txt","temp2.txt");

natsort($temp_files);
echo "Natural order: ";
print_r($temp_files);
echo "<br />";

natcasesort($temp_files);
echo "Natural order case insensitve: ";
print_r($temp_files);
?>

The output of the code above will be:
上述代码将输出下面的结果：

Natural order:
Array
(
[0] => Temp10.txt
[1] => Temp22.txt
[2] => temp1.txt
[4] => temp2.txt
[3] => temp15.txt
)
Natural order case insensitve:
Array
(
[2] => temp1.txt
[4] => temp2.txt
[0] => Temp10.txt
[3] => temp15.txt
[1] => Temp22.txt
)

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