Needed to just reverse keys. Don't flog me if there is a better way. This was a simple solution.
<?php
function array_reverse_keys($ar){
return array_reverse(array_reverse($ar,true),false);
}
?>
array_reverse
(PHP 4, PHP 5, PHP 7, PHP 8)
array_reverse — Devuelve un array con los elementos en orden inverso
Descripción
Toma un valor array y devuelve un nuevo array con
el orden de los elementos invertido.
Parámetros
-
array -
El array de entrada.
-
preserve_keys -
Si se establece en
truelas claves numéricas se conservarán. Las claves no numéricas no se ven afectadas por este ajuste y se conservarán siempre.
Valores devueltos
Devuelve el array en orden inverso.
Ejemplos
Ejemplo #1 Ejemplo de array_reverse()
<?php
$input = array("php", 4.0, array("verde", "rojo"));
$reversed = array_reverse($input);
$preserved = array_reverse($input, true);
print_r($input);
print_r($reversed);
print_r($preserved);
?>El resultado del ejemplo sería:
Array
(
[0] => php
[1] => 4
[2] => Array
(
[0] => verde
[1] => rojo
)
)
Array
(
[0] => Array
(
[0] => verde
[1] => rojo
)
[1] => 4
[2] => php
)
Array
(
[2] => Array
(
[0] => verde
[1] => rojo
)
[1] => 4
[0] => php
)
add a note
User Contributed Notes 3 notes
alfbennett at gmail dot com ¶
14 years ago
atulmvAThotmailDOTcoDOTuk ¶
12 years ago
Here are a couple of routines to swap the order of two elements in an array
<?php
function array_swap_forward($arr,$elem)
{
$ndx = array_search($elem,$arr) - 1;
$b4 = array_slice($arr,0,$ndx);
$mid = array_reverse(array_slice($arr,$ndx,2));
$after = array_slice($arr,$ndx + 2);
return array_merge($b4,$mid,$after);
}
function array_swap_back($arr,$elem)
{
$ndx = array_search($elem,$arr);
$b4 = array_slice($arr,0,$ndx);
$mid = array_reverse(array_slice($arr,$ndx,2));
$after = array_slice($arr,$ndx + 2);
return array_merge($b4,$mid,$after);
}
$arr =array('a','b','c','d','e','f');
print_r(array_swap_forward($arr,'c'));
echo '<br>';
print_r(array_swap_back($arr,'c'));
?>
rahulavhad at yahoo dot com ¶
23 years ago
This code can help in recursive reversing of the array...
<?php
$arr1 = array(2,1,array(5,2,1,array(9,8,7)),5,0);
$arr1 = array_reverse($arr1);
function Reverse_Array($array)
{ $index = 0;
foreach ($array as $subarray)
{ if (is_array($subarray))
{ $subarray = array_reverse($subarray);
$arr = Reverse_Array($subarray);
$array[$index] = $arr;
}
else {$array[$index] = $subarray;}
$index++;
}
return $array;
}
$arr2 = Reverse_Array($arr1);
?>
