How can I get an array of values from an associative array ?
Associate array Example:
Array
(
[0] => Array
(
[0] => 1
[1] => 2
[2] => 3
)
[1] => Array
(
[0] => 4
[1] => 5
[2] => 6
)
[2] => Array
(
[0] => 7
)
)
Desired Output
Array
(1,2,3,4,5,6,7)
Not sure it'll suit you, as it's PHP >= 5.3 only, but here's a possible solution, using array_walk_recursive and a closure (see Anonymous functions) :
$array = array(
array(1, 2, 3),
array(4, 5, 6),
array(7),
);
$result = array();
array_walk_recursive($array, function ($value, $key) use (& $result) {
$result[] = $value;
});
var_dump($result);
And the result :
array
0 => int 1
1 => int 2
2 => int 3
3 => int 4
4 => int 5
5 => int 6
6 => int 7
Basicaly, the closure is the only way I got this to work : it's used to import the $result variable, by reference, into the anonymous function.
And, just to post it, the only I got this working for PHP 5.2 (i.e. not using a closure) is with this :
$result = array();
array_walk_recursive($array, 'my_func', & $result);
var_dump($result);
function my_func($value, $key, & $result) {
$result[] = $value;
}
Which works too -- but raises a warning :
Deprecated: Call-time pass-by-reference has been deprecated
Unfortunatly, I didn't find a way of getting this to work without passing $result by reference at call-time :-(
(Maybe someone else has an idea, about how to do that ?)
Do an array_merge() on each separate member.
$test = Array
(
"0" => Array
(
0 => 1,
1 => 2,
2 => 3,
),
"1" => Array
(
0 => 4,
1 => 5,
2 => 6,
),
"2" => Array
(
0 => 7,
)
);
print_r(array_merge($test[0],$test[1],$test[2]));
// Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 [6] => 7 )
under php 5.3 this should be really nice and convenient, because the array elements used by array_reduce are interpreted as mixed rather than fixed as integer
so
print_r(array_reduce($test, 'array_merge'))
I haven't tested it -- no copy of 5.3 -- at least in theory that should do it. Under <5.3 you'll get errors.
Note that this only merges the top level of array, unlike the solution using array_walk_recursive.
$flattened = call_user_func_array('array_merge', $array);
