I have this multidimensional array:
Array (
[0] => Array (
[id] => 1
[list_name] => List_Red
)
[1] => Array (
[id] => 2
[list_name] => List_Blue
)
)
...and i would like to create a new array containing only the [id]'s from it.
I would appreciate it alot if you guys could help me with that ^^
Thanks in advance.
@fabrik Your solution indeed does work but it is also incorrect as PHP will throw a E_WARNING telling you that you're appending to an array that did not yet exist. Always initialise your variables before you use them.
$newList = array();
foreach($myList as $listItem) {
$newList[$listItem['id']] = $listItem['list_name'];
}
This is now a list of all your list_names in the following format.
Array (
1 => List_Red
2 => List_Blue
)
Much easier for you to work with and you can now iterate over it like so..
foreach($newList as $itemID => $itemName) {
echo "Item ID: $itemID - Item Name: $itemName<br>";
}
You could use array_map like this:
$new_array = array_map( function( $a ) { return $a['id']; }, $orig_array );
That's assuming PHP 5.3, for PHP < 5.3 you have to use create_function:
$new_array = array_map( create_function( '$a', 'return $a["id"];' ), $orig_array );
foreach($array as $label => $data)
{
$final[] = $data['id'];
}
