Assign number as array key name - php

Question

I need to assign in an associative array a number as key name, but if I do:
// Places (generated by mysql)
$places = array (
0 => '1234',
1 => '2345'
);
// Week stats (generated by mysql)
$week = array (
1234 =>
array (
0 =>
array (
'iid' => '1234',
'mid' => 'xxxxxxxx',
'name' => 'Name1',
),
1 =>
array (
'iid' => '1234',
'mid' => 'xxxxxxxx',
'name' => 'Name3',
)
),
2345 =>
array (
0 =>
array (
'iid' => '2345',
'mid' => 'xxxxxxxx',
'name' => 'Name2',
),
2 =>
array (
'iid' => '2345',
'mid' => 'xxxxxxxx',
'name' => 'Name4',
)
)
);
foreach($places as &$place) {
echo $place;
$i = 0;
foreach($week[$i] as &$value) {
echo $value["name"];
$i++;
}
}
it doesn't work:
http://codepad.viper-7.com/Y1g37t
because seems I should call it with:
echo $arr[<specific index>];
Instead I need to set "1234" and "2345" as strings, like this array:
$arr = Array("foo" => "bar");
So I can call it with
$arr[0] // bar
How can I do?
Solution
Thanks to #kirilloid
i use this code:
$vararr = array_keys($week);
$key = $vararr[$i];
To get the key

Answer 1

It because it's an map and map associates values to keys so you have to do this :
<?php
$myNumber = 1234;
$myValue = "foo";
$arr = Array( $myNumber => $myValue );
echo $arr[1234];
?>
And don't forget to replace the ":" at your first line !
To iterate on a "map" you can use the foreach function :
foreach($arr as $key=>$value) {
echo $key;
echo $value;
}
This should display your key and the value associated :
1234
foo
Here is the difference with a simple array:
$array = array("foo", "bar", "hallo", "world");
echo $array[0];

Answer 2

You may either use array_keys:
echo $arr[array_keys($arr)[0]];
or reset and current:
reset($arr);
echo current($arr);

Answer 3

There is no problem here - this is how it is supposed to work.
If you create an array like this:
$myNumber = 1234;
$myValue = "foo";
$arr = Array( $myNumber => $myValue );
then the index of the element is 1234, not 0.
You can retrieve it with echo $arr[1234]
If you need to loop over the array you can do so with
foreach($arr as $key=>$value) {
// do something with $value
}

Answer 4

There is no problem. As the value of $myNumber is 1234, you should access the array element like this:
echo $arr[1234];
If you need to access them in a foor loop you can get the keys as an array:
$keys = array_keys($arr);
$keys_count = count($keys);
for ($i=0; i<$keys_count; $i++) {
echo $arr[$keys[$i]];
}