I have the following array returned by my script.
Array
(
[0] => Array
(
[id] => 67
)
[1] => Array
(
[id] => 68
)
[2] => Array
(
[id] => 69
)
[3] => Array
(
[id] => 70
)
)
How can I convert it to:
Array
(
[0] => 67
[1] => 68
[2] => 69
[3] => 70
)
I'm only interested in the IDs returned.
array_map() is one possibility since it accumulates any value returned by the callback into its returned array. The callback then just needs to return the id :
$flat = array_map(function($a) {return $a['id'];}, $orig_array);
The above requires PHP 5.3+, since it uses an anonymous function, but the same can be achieved with a named function passed as a string to array_map().
Otherwise, a foreach loop is pretty conventional and can preserve the original keys had then been non-sequential.
$flat = array();
foreach ($orig_array as $key => $a) {
$flat[$key] = $a['id'];
}
array_pluck() tmk. Lots of examples on how to make them though.I have not tested this function, but try this suggestion: http://www.php.net/manual/en/function.array-values.php#104184
$temp = call_user_func_array('array_merge_recursive', $arr);
$final = $temp['id'];
print_r($final);
Why that works is tricky. Honestly, just use a foreach loop.
Continuing @Mickael's answer, you can also use array_walk() function:
function format(&$item, $key) {
$item = $item["id"];
}
array_walk($arr, "format");
Or in one line with lambda function:
array_walk($arr, create_function('&$item, $key', '$item = $item["id"];'));
It works with your array directly, hence we can easily call it "array converting".
