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php数组函数序列之sort() 对数组的元素值进行升序排序

Jun 13, 2016 pm 12:04 PM
php sort value element function Ascending order right sequence according to sort array usage of conduct

sort()定义和用法
sort() 函数按升序对给定数组的值排序。

注释:本函数为数组中的单元赋予新的键名。原有的键名将被删除。

如果成功则返回 TRUE,否则返回 FALSE。

语法
sort(array,sorttype)参数 描述
array 必需。输入的数组。
sorttype 可选。规定如何排列数组的值。可能的值:

SORT_REGULAR - 默认。以它们原来的类型进行处理(不改变类型)。
SORT_NUMERIC - 把值作为数字来处理
SORT_STRING - 把值作为字符串来处理
SORT_LOCALE_STRING - 把值作为字符串来处理,基于本地设置*。


*:该值是 PHP 4.4.0 和 5.0.2 新加的。在 PHP 6 之前,使用了系统的区域设置,可以用 setlocale() 来改变。自 PHP 6 起,必须用 i18n_loc_set_default() 函数。

例子

复制代码 代码如下:


$my_array = array("a" => "Dog", "b" => "Cat", "c" => "Horse");

sort($my_array);
print_r($my_array);
?>


输出:

Array
(
0] => Cat
[1] => Dog
[2] => Horse
)
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