CODEWITHSUNDEEP
phparrays
Tricky
Tricky

Reputation: 420

Convert CSV string to Array keys and a value of 1 or true

Please could someone help find a better solution to the code below.

Here is my existing solution:

$list = '54,78,3,5';

$list = explode(",",$list);

foreach($list as $k => $v) { $compare[$v] = 1; }

when i run array_flip instead of the foreach on $list it returns an array like this:

Array(
    54 => 0,
    78 => 1,
    ...
)

I need this so another array which is already in this format can be compared with an IF statment:

Array(
    54 => 1,
    78 => 1,
    ...
)

Upvotes: 2

Views: 48

Answers (2)

James
James

Reputation: 4783

Do you need the original $list to be a variable? Can't you just make it an array from the start wherever the data comes from, and append 1 or true to the value?

Otherwise, before your current foreach, add a new loop and go through $list (which you made into an array) and make a new array appending the required value to each key (keys taken from $list): 

foreach ($list as $key)
  {
    $new_array[$key] = 1;
  }

Upvotes: 0

John Conde
John Conde

Reputation: 219864

$list = '54,78,3,5';
$list = explode(",",$list);
$array = array_combine($list, array_fill(0, count($list), 1));
print_r($array);

Array
(
    [54] => 1
    [78] => 1
    [3] => 1
    [5] => 1
)

array_fill() will create an array with all of its values being the number 1 at the same size as the $list array. array_combine() then creates a new array with the values of $list as the keys and the values created by array_fill();

Demo

Upvotes: 2

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