array_fill_keys

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

array_fill_keysLlena un array con valores, especificando las keys

Descripción

array_fill_keys(array $keys, mixed $value): array

Llena un array con el valor del parámetro value, usando los valores del array keys como claves.

Parámetros

keys

Array con los valores que serán usados como keys. Valores ilegales para una clave serán convertidos a string.

value

Valor usado para el llenado.

Valores devueltos

Retorna la matriz llenada

Ejemplos

Ejemplo #1 Ejemplo de array_fill_keys()

<?php
$keys
= array('foo', 5, 10, 'bar');
$a = array_fill_keys($keys, 'banana');
print_r($a);
?>

El resultado del ejemplo sería:

Array
(
    [foo] => banana
    [5] => banana
    [10] => banana
    [bar] => banana
)

Ver también

  • array_fill() - Llena un array con valores
  • array_combine() - Crea un nuevo array, usando una matriz para las claves y otra para sus valores

add a note

User Contributed Notes 6 notes

up
67
sergli at nigma dot ru
12 years ago
<?php
$a
= array("1");

var_dump(array_fill_keys($a, "test"));
?>

array(1) {
[1]=>
string(4) "test"
}

now string key "1" become an integer value 1, be careful.
up
31
atul dot kr_singh at hotmail dot com
11 years ago
If an associative array is used as the second parameter of array_fill_keys, then the associative array will be appended in all the values of the first array.
e.g.
<?php
$array1
= array(
"a" => "first",
"b" => "second",
"c" => "something",
"red"
);

$array2 = array(
"a" => "first",
"b" => "something",
"letsc"
);

print_r(array_fill_keys($array1, $array2));
?>

The output will be
Array(
[first] => Array(
[a] => first,
[b] => something,
[0] => letsc
),
[second] => Array(
[a] => first,
[b] => something,
[0] => letsc
),
[something] => Array(
[a] => first,
[b] => something,
[0] => letsc
),
[red] => Array(
[a] => first,
[b] => something,
[0] => letsc
)
)
up
3
ray.paseur sometimes uses gmail
2 years ago
Get an associative array of zeros for counting letter frequency

<?php
$ltrs
= array_fill_keys( range('a', 'z'), 0 );
up
-2
Scratchy
16 years ago
RE: bananasims at hotmail dot com

I also needed a work around to not having a new version of PHP and wanting my own keys. bananasims code doesn't like having an array as the second parameter...

Here's a slightly modified version than can handle 2 arrays as inputs:

//we want these values to be keys
$arr1 = (0 => "abc", 1 => "def");
/we want these values to be values
$arr2 = (0 => 452, 1 => 128);

function array_fill_keys($keyArray, $valueArray) {
if(is_array($keyArray)) {
foreach($keyArray as $key => $value) {
$filledArray[$value] = $valueArray[$key];
}
}
return $filledArray;
}

array_fill_keys($arr1, $arr2);

returns:
abc => 452, def =>128
up
-4
bananasims at hotmail dot com
17 years ago
Some of the versions do not have this function.
I try to write it myself.
You may refer to my script below

function array_fill_keys($array, $values) {
if(is_array($array)) {
foreach($array as $key => $value) {
$arraydisplay[$array[$key]] = $values;
}
}
return $arraydisplay;
}
up
-4
manavchugh988 at gmail dot com
2 years ago
see array_fill_keys are basically used to make a new array from a pre-existing array in a form that the value of the pre-existing array will now be the key of the new Array .And there value will be same That we had given in the 2nd parameter . Example Below---->>>

<?php
//pre existing array
$a = array("a","b","c","d","e");

//new array with a single same value

$newArray = array_fill_keys($a, "Testing");

//printing the array

echo "<pre>";
print_r($newArray);
echo
"</pre>";
?>
output;
Array
(
[a] => Testing
[b] => Testing
[c] => Testing
[d] => Testing
[e] => Testing
)
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