How to reverse the order of an array in php

You can use the array_reverse() function in PHP to reverse the order of the array. The syntax format is "array_reverse(array,preserve)"; the parameter preserve can be omitted and is used to specify whether to retain the key names of the original array (only For numeric key names, non-numeric keys are not affected).

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

php reverses the order of the array

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);
$arr1 =array("a"=>"Volvo","b"=>"BMW","c"=>"Toyota");
echo "原数组顺序：";
var_dump($arr1);
$arr2=array_reverse($arr1);
echo "<br>数组反转后的顺序：";
var_dump($arr2);
?>

Output:

原数组顺序：array (size=3)
  'a' => string 'Volvo' (length=5)
  'b' => string 'BMW' (length=3)
  'c' => string 'Toyota' (length=6)

数组反转后的顺序：array (size=3)
  'c' => string 'Toyota' (length=6)
  'b' => string 'BMW' (length=3)
  'a' => string 'Volvo' (length=5)

Related function description:

array_reverse() function returns an array in reverse element order.

array_reverse() function reverses the order of elements in the original array, creates a new array and returns it. If the second argument is specified as true, the element's numeric key remains unchanged, otherwise the key is lost.

Grammar:

array_reverse(array,preserve)

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