php arsort_PHP arsort（）函数与示例

php arsort

PHP arsort()函数 (PHP arsort() function)

arsort() function is used to sort an associative array in descending order based on the values, as we know that an associative array contains keys and values, this method sorts an array according to the values.

arsort()函数用于根据值对降序对关联数组进行排序，因为我们知道关联数组包含键和值 ，因此该方法根据值对数组进行排序。

It does not return a sorted array, it sorts the input array.

它不返回已排序的数组，而是对输入数组进行排序。

Syntax:

句法：

    arsort(array, [mode]);

Here,

这里，

• array is an input array

  数组是输入数组

• mode is an optional parameter, its default value is 0, it has following values:

  mode是一个可选参数，其默认值为0，它具有以下值：

  0 – It is used to compare items normally

  0 –用于正常比较项目

  1 – It is used to compare items numerically

  1 –用于数字比较项目

  2 – It is used to compare items as strings

  2 –用于比较项目作为字符串

  3 – It is used to compare items as current locale strings

  3 –用于比较项目作为当前区域设置字符串

  4 – It is used to compare items as strings (natural ordering)

  4 –用于将项目作为字符串进行比较(自然顺序)

Examples:

例子：

    Input:
    $person = array(
        "radib" => 21,
        "amit" => 21,
        "abhi" => 20,
        "prem" => 27,
        "manju" => 25
        );

    Output:
    sorted array...  
    Array
    (    
        [prem] => 27 
        [manju] => 25
        [radib] => 21
        [amit] => 21 
        [abhi] => 20 
    )

PHP code:

PHP代码：

<?php    
    $person = array(
        "radib" => 21,
        "amit" => 21,
        "abhi" => 20,
        "prem" => 27,
        "manju" => 25
        );

    print ("unsorted array...\n");
    print_r ($person);
    //sorting...
    
    arsort($person);
    print ("sorted array...\n");
    print_r ($person);    
?>

Output

输出量

unsorted array...
Array
(    
    [radib] => 21
    [amit] => 21 
    [abhi] => 20 
    [prem] => 27 
    [manju] => 25
)    
sorted array...  
Array
(    
    [prem] => 27 
    [manju] => 25
    [radib] => 21
    [amit] => 21 
    [abhi] => 20 
) 

翻译自: https://www.includehelp.com/php/arsort-function-with-example.aspx

php arsort