Here is an array I have:
$a = array('a' => 'a1', 'b' => 'a2', 'c' => 'a3', 'd' => 'a4', 'e' => 'a5');
What I would like to do is reverse the values of the array while keeping the keys intact, in other words it should look like this:
$a = array('a' => 'a5', 'b' => 'a4', 'c' => 'a3', 'd' => 'a2', 'e' => 'a1');
How should I go about it?
P.S. I tried using array_reverse() but it didn't seem to work
Some step-by-step processing using native PHP functions (this can be compressed with less variables):
$a = array('a' => 'a1', 'b' => 'a2', 'c' => 'a3', 'd' => 'a4', 'e' => 'a5');
$k = array_keys($a);
$v = array_values($a);
$rv = array_reverse($v);
$b = array_combine($k, $rv);
var_dump($b);
Result:
array(5) {
'a' =>
string(2) "a5"
'b' =>
string(2) "a4"
'c' =>
string(2) "a3"
'd' =>
string(2) "a2"
'e' =>
string(2) "a1"
}
It is possible by using array_combine, array_values, array_keys and array_values. May seem like an awful lot of functions for a simple task, and there may be easier ways though.
array_combine( array_keys( $a ), array_reverse( array_values( $a ) ) );
Here another way;
$keys = array_keys($a);
$vals = array_reverse(array_values($a));
foreach ($vals as $k => $v) $a[$keys[$k]] = $v;
I think this should work..
<?php
$old = array('a' => 'a1', 'b' => 'a2', 'c' => 'a3', 'd' => 'a4', 'e' => 'a5');
$rev = array_reverse($old);
foreach ($old as $key => $value) {
$new[$key] = current($rev);
next($rev);
}
print_r($new);
?>
This'll do it (just wrote it, demo here):
<?php
function value_reverse($array)
{
$keys = array_keys($array);
$reversed_values = array_reverse(array_values($array), true);
return array_combine($keys, $reversed_values);
}
$a = array('a' => 'a1', 'b' => 'a2', 'c' => 'a3', 'd' => 'a4', 'e' => 'a5');
print_r( value_reverse($a) );
