Arrays
Arrays are ordered key/value maps.
What it is
Arrays are ordered key/value maps.
When to use it
Use for lists and simple structured data.
Syntax
$names = array_map(fn ($user) => $user["name"], $users);Example
$users = [["name" => "Ada"], ["name" => "Lin"]];
$names = array_map(fn ($user) => $user["name"], $users);
foreach ($names as $name) {
echo $name . PHP_EOL;
}Common mistakes
Missing keys produce warnings; numeric keys may be preserved by filtering.