- var_dump: documentation ( source)
- array_filter: documentation ( source)
- array_keys: documentation ( source)
<?php
class Test {
public static function is_role($a) {
var_dump($a);
}
}
$wp_roles = 'Test';
$roles = array_filter( array_keys( ['key' => 'test'] ), array( $wp_roles, 'is_role' ) );