Add explode array as keys to new array

Question

$input = "hello|world|look|at|this";
$explode = explode("|", $input);
$array = array("Title" => "Hello!", "content" => $explode);

This will output:

array(2) {
  ["Title"]=>
  string(6) "Hello!"
  ["content"]=>
  array(5) {
    [0]=>
    string(5) "hello"
    [1]=>
    string(5) "world"
    [2]=>
    string(4) "look"
    [3]=>
    string(2) "at"
    [4]=>
    string(4) "this"
  }
}

But I want them to be keys with a NULL as value as I add values in a later step.

Any idea how to get the explode() function to return as keys? Is there a function from php available?

array_fill_keys() when you're creating the array in the first place — Mark Baker
– Mark Baker, Commented Jan 15, 2014 at 9:21

Jim · Accepted Answer · 2014-01-15 09:22:06Z

2

array_fill_keys can populate keys based on an array:

array_fill_keys ($explode, null);

answered Jan 15, 2014 at 9:22

Jim

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Comments

Joran Den Houting · Accepted Answer · 2014-01-15 09:26:43Z

0

Use a foreach loop on the explode to add them:

foreach($explode as $key) {
    $array["content"][$key] = "NULL";
}

answered Jan 15, 2014 at 9:26

Joran Den Houting

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Comments

Soundz · Accepted Answer · 2014-01-15 09:22:31Z

0

how about array_flip($explode)? That should give you this

array(2) {
 ["Title"]=>
 string(6) "Hello!"
   ["content"]=>
    array(5) {
      [hello]=> 1

No nullvalues but atleast you got the keys right

edited Jan 15, 2014 at 9:22

answered Jan 15, 2014 at 9:20

Soundz

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1 Comment

Ryan Over a year ago

Values wouldn't be null. However you could do something after such as foreach($new_explode as &$val) { $val = null; } after.

Yami · Accepted Answer · 2014-01-15 09:23:51Z

0

$input = "hello|world|look|at|this";
$explode = explode('|', $input);
$nulls = array();
foreach($explode as $x){ $nulls[] = null; };
$array = array("Title" => "Hello!", "content" => array_combine($explode, $nulls));

answered Jan 15, 2014 at 9:23

Yami

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