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@ 2019-05-23T09:02:18Z

<?php

class User
{
    public $username;
    public $name;

    public function __construct($username)
    {
        $this->username = $username;
        $this->name = str_replace(' ', '', $username);
    }
}

$users = array(
    new User('user 1'),
    new User('user 2'),
    new User('user 3')
);

    function new_array_column($input , $column_key, $index_key = null) {
        $result = array();
        array_walk($input, function($value, $key) use (&$result, $column_key, $index_key) {
            $result[empty($index_key) ? $key : is_object($value) ? $value->{$index_key} : $value[$index_key]]
            = empty($column_key) ? $value : (is_object($value) ? $value->{$column_key} : $value[$column_key]);
        });
        return $result;
    }

print_r(
    new_array_column($users, null, 'name')
);

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Unparenthesized `a ? b : c ? d : e` is not supported. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in /in/OPNMX on line 24
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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