Dynamically update a php array with a function - php

Question

I have multiple sitemaps and I would like to merge them all, but before merging them, I need to append a unique variable to all values in all arrays.
// The global variable
define("BASE_URL", "http://domain.com");
$sitemap_full = [ "home" => BASE_URL ];
// One of the arrays
$sitemap_example = [
"foo" => "/bar",
"gnu" => "/lar"
];
Since I have multiple of those arrays, I wanted to create a function that will append the link.
function pushToSitemap($initial_sitemap, $sitemap) {
foreach ($initial_sitemap as $title => $url) {
return $sitemap[$title] = BASE_URL . $url;
}
}
And in action in will be:
pushToSitemap($sitemap_example, $sitemap_full);
But this just doesn't work because if I print_r($sitemap_full); it will display Array( "home", "http://domain.com" );.
What really annoys me is that if in the function I echo them, they will be echoed.
What am I doing wrong?
EDIT
It should display
Array(
"home" => "http://domain.com"m
"foo" => "http://domain.com/bar",
"gnu" => "http://domain.com/lar
);

Answer 1

Your problem seems lie inside your foreach function:
function pushToSitemap($initial_sitemap, $sitemap) {
foreach ($initial_sitemap as $title => $url) {
return $sitemap[$title] = BASE_URL . $url;
}
}
You are returning just a single item, what's more, the formatting is off.
Instead,
function pushToSitemap($initial_sitemap, $sitemap) {
foreach ($initial_sitemap as $title => $url) {
$sitemap[$title] = BASE_URL . $url;
}
return $sitemap;
}
$sitemap_full = pushToSitemap($sitemap_example, $sitemap_full);