PHP returns an array of inverted order functions Array_reverse ()

Instance

Returns an array of flip orders:

<?php$a=array ("A" = "Volvo", "B" and "BMW", "c" = "Toyota");p Rint_r (Array_reverse ($a));? >

Definition and usage

The Array_reverse () function returns an array of flip orders.

Grammar

Array_reverse (Array,preserve)

parameters	description
array	required. Specifies the array.
preserve	optional. Specifies whether the key name of the original array is preserved. If set to TRUE retains the key of the number. Non-numeric keys are not affected by this setting and are always retained. Possible values: True false< /p>

Technical details

return value:	Returns the inverted array.
PHP version:	4 +
Update log:	The preserve parameter was added in PHP 4.0.3.

More examples

Example 1

Outputs the original array, flips the array, and retains the inverted array of the original array key names:

<?php$a=array ("Volvo", "XC90", Array ("BMW", "Toyota")), $reverse =array_reverse ($a); $preserve =array_reverse ($a, true); Print_r ($a);p Rint_r ($reverse);p rint_r ($preserve);? >

Instance:

<?php$input = Array ("PHP", 4.0, Array ("Green", "Red")), $result = Array_reverse ($input); $result _keyed = Array_reverse ($input, true);? >

This will make the $result and $result _keyed have the same unit, but note the difference between the key names. The printout of the $result and the $result _keyed is shown separately:

Array ([0] = = Array (  [0] = green  [1] = + red)  [1] = + 4 [2] + PHP) Array ([2] = = Array (
  [0] = green  [1] = + red)  [1] = 4 [0] = + PHP)