class Settings {
public $constants = [
'database' => [
'APP_DB_HOST' => 'localhost'
],
];
}
class Constants extends Settings {
public $database = [
'APP_DB_HOST' => $settings->constants['database']['APP_DB_HOST'], // not working
];
}
I need to access parent class array values in child class. but this $settings->constants['database']['APP_DB_HOST'] is not working for some reason.
Here is the working solution
<?php
class Settings {
public $constants = [
'database' => [
'APP_DB_HOST' => 'localhost'
],
];
}
class Constants extends Settings {
public $database;
public function __construct(){
$database = [
'APP_DB_HOST' => $this->constants['database']['APP_DB_HOST'], // working
];
}
}
print_r(new Constants());
outputs:
Constants Object
(
[database] =>
[constants] => Array
(
[database] => Array
(
[APP_DB_HOST] => localhost
)
)
)
as per your comment, if you want to do it in other class function, you can do that as well.
class Constants extends Settings {
public $database;
public function useParentHost(){
$this->database = [
'APP_DB_HOST' => $this->constants['database']['APP_DB_HOST'], // working
];
return $this->database;
}
}
and then
$test = new Constants();
print_r($test->useParentHost());
you have to declare some function to use $this, without/outside the function this will cause an error.
$constants = new Constants(); and echo $constants->constants['database']['APP_DB_HOST']; it is working but not $constants->database['APP_DB_HOST'];why is it?localhost by doing this $test = new Constants(); $constants = ($test->useParentHost()); echo $constants['APP_DB_HOST'];The variable $settings does not exist, perhaps you mean $this?
$this->constants['database']['APP_DB_HOST'];
Enjoy.
$this inside a class outside of function will cause an error
$this->database, it yields output like this Constants Object ( [database] => Array ( [APP_DB_HOST] => localhost ) [constants] => Array ( [database] => Array ( [APP_DB_HOST] => localhost ) ) )
$variableas a$constantdoesn't make it a "constant" -- it is still a variable.