how to create php keys from an arrays values? [duplicate] - php

Question

This question already has answers here:
Create nested array by array of keys
(3 answers)
Closed 6 years ago.
I have an array like so:
$input = array("visit", "outdoor", "parks-trailer");
$input_content = "A Value for last array element for input array."
$another_input = array("visit", "outdoor");
$another_input_content = "A Value for last array element for $input_content array."
And I have some text to assign to the last element of the array, once built.
Basically, what I need is the returned array to be like this:
$output = array(
"visit" => array(
"outdoor" => array(
"A Value for last array element for $input_content array."
"parks-trailer" => "A Value for last array element for input array."
)
)
);
How can I do this from values of an $input array that will always be 1 dimensional.
$content = 'My Value';
$output = array();
$flipped = array_flip($input);
$count = count($input) - 1;
foreach($flipped as $key => $flip)
{
if ($count >= $key)
$output[$key] = $content;
else
$output[$key] = array();
}
The problem here is that array_flip does work, but it doesn't do multidimensional here? And so array_flip transforms to array('visit' => 0, 'outdoor' => 1, 'parks-trailer' => 2), but I'm at a loss on how to get it to do multidimensional array, not singular.
I need to loop through multiples of these and somehow merge them into a global array, the answer given in here is not the same.
So, I need to merge each 1 of these into another array, keeping the values, if they exist. array_merge does not keep the values, array_merge_recursive does not keep the same key structure. How to do this?

Answer 1

I'm not sure sure why you would want such thing, but this is an option:
$ar = ['a', 'b', 'c'];
function arrayMagicFunction($ar, $last_string = 'STRING') {
$ret = $last_string;
$ar = array_reverse($ar);
foreach ($ar as $v) {
$ret = [$v => $ret];
}
return $ret;
}
var_dump(arrayMagicFunction($ar, 'A Value here'));
Output:
array(1) {
'a' =>
array(1) {
'b' =>
array(1) {
'c' =>
string(12) "A Value here"
}
}
}