How to find the third smallest value of an array in php

Method: 1. Use array_values() to convert the array into an index array, the syntax is "array_values ​​(original array)"; 2. Use sort() to sort the array in ascending order, the syntax is "sort(index array)" , at this time the element with index 2 is the third smallest value; 3. Use the "index array name [2]" statement to obtain.

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, DELL G3 computer

php to find the array number Method of three small values

In PHP, sort the array in ascending order, so that the small value comes first, the large value comes last, and the first three values ​​(a[0], a [1], a[2]) are the first, second, and third smallest values. Just take out the element with index 2 (a[2]).

The following are the specific steps.

1. Convert the array to an index array

Use array_values() to obtain the values ​​of all elements in the array. You can convert the associative array into an index array to ensure that the array is Index array. (In this way, the index value can be used to extract the third smallest value later).

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array("a"=>44,"b"=>23,"c"=>56,"d"=>2,"e"=>9,"f"=>1,"g"=>8,"h"=>-1);
var_dump($arr);
$value=array_values($arr);
var_dump($value);
?>

2. Sort the index array in ascending order

Use the sort() function to sort the array in ascending order, so that the array elements Sort from small to large.

sort($value);
var_dump($value);

At this time, the third element at the beginning, that is, the one with index 2 is the third smallest value required.

3. Get the third smallest value

Just use the "array name [2]" form to get the third element after sorting.

echo "数组第三小值为：".$value[2];

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