What is the simplest way to sort three numbers in php

The simplest sorting method: 1. Store the three numbers that need to be sorted into an empty array; 2. Directly use the built-in array sorting functions sort(), rsort(), asort(), ksort( ), arsort(), and krsort() can sort the array elements according to certain rules.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Give three numbers in php The simplest way to sort is to use the array sorting function.

• Save the three numbers to be sorted into an empty array

• Use the built-in array sorting function sort(), rsort(), asort(), ksort(), arsort(), krsort() sorts array elements according to certain rules

Example:For a set of data Sort 10, 23, 5, 12, 84, 16

1. Store it in the array:

$arr = array(10, 23, 5, 12, 84, 16);

2. Sort in ascending order

• sort(): Sort the array elements in ascending order

• asort(): Sort the array in ascending order according to the key value of the associated array

• ksort(): Sort the array in ascending order according to the key name of the associated array

<?php
$arr = array(10, 23, 5);
var_dump($arr);
sort($arr);
var_dump($arr);
?>

3. Sort in descending order

• rsort(): Sort the array elements in descending order

• arsort(): Sort the array in descending order according to the key value of the associated array

• krsort(): Sort the array in descending order according to the key name of the associated array

<?php
$arr = array(5, 16, 29, 15);
var_dump($arr);
rsort($arr);
var_dump($arr);
?>

Recommended learning: "PHP Video tutorial》、《PHP ARRAY》

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