Create associative array with a static string for values and keys from an array column

Question

I have an array object like this:

Array
(
    [0] => stdClass Object
        (
            [id] => 1
            [name] => sam
        )

    [1] => stdClass Object
        (
            [id] => 2
            [name] => tim
        )

    [2] => stdClass Object
        (
            [id] => 3
            [name] => nic
        )

)

And I want to have this:

Array
(
    [sam] => sample text
    [tim] => sample text
    [nic] => sample text
)

My current approach:

$arr = array();

foreach($multi_arr as $single_arr) {
    $arr[$single_arr->name] = "sample text";
}

Is there a cleaner/better approach than this? Thanks

If this data is coming from a database, then what is stopping you from adding a static string as a column in your SELECT clause (aliased as static_text then merely calling array_column($resultSet, 'static_text', 'name')? — mickmackusa
– mickmackusa ♦, Commented Sep 23, 2022 at 11:42

Federkun · Accepted Answer · 2017-09-07 08:26:56Z

2

You can use array_map to get all the keys, then use array_fill_keys to populate the final array.

$arr = array_fill_keys(array_map(function($e) {
    return $e->name;
}, $multi_arr), "sample text");

If sample text is part of the stdClass object:

$arr = array_merge(...array_map(function($e) {
    return [$e->name => $e->description];
}, $multi_arr));

edited Sep 7, 2017 at 8:26

answered Sep 7, 2017 at 8:02

Federkun

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3 Comments

simple guy Over a year ago

What if "sample text" is dynamic?

Federkun Over a year ago

is "sample text" the same for all? put it in a variable, and use that

simple guy Over a year ago

$multi_arr has 'description' which i can call $single_arr->description to populate "sample text". Sorry about this, should have include this in my question

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