<?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.
array_fill_keys
(PHP 5 >= 5.2.0, PHP 7, PHP 8)
array_fill_keys — Создаёт массив и заполняет его значениями с определёнными ключами
Описание
Создаёт и заполняет массив значением параметра value,
используя значения массива keys в качестве ключей.
Список параметров
-
keys -
Массив значений, которые будут использованы в качестве ключей. Некорректные ключи массива будут преобразованы в строку (string).
-
value -
Заполняемое значение
Возвращаемые значения
Возвращает заполненный массив
Примеры
Пример #1 Пример использования array_fill_keys()
<?php
$keys = array('foo', 5, 10, 'bar');
$a = array_fill_keys($keys, 'banana');
print_r($a);
?>Результат выполнения приведённого примера:
Array
(
[foo] => banana
[5] => banana
[10] => banana
[bar] => banana
)
Смотрите также
- array_fill() - Заполняет массив значениями
- array_combine() - Создаёт новый массив, используя один массив в качестве ключей, а другой для его значений
add a note
User Contributed Notes 10 notes
sergli at nigma dot ru ¶
12 years ago
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 );
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
)
)
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, $arr2);
returns:
abc => 452, def =>128
bananasims at hotmail dot com ¶
18 years ago
Some of the versions do not have this function.
I try to write it myself.
You may refer to my script below
function array_fill_keys($array, $values) {
if(is_array($array)) {
foreach($array as $key => $value) {
$arraydisplay[$array[$key]] = $values;
}
}
return $arraydisplay;
}
matrebatre ¶
16 years ago
This function does the same as:
<?php
$array = array_combine($keys,array_fill(0,count($keys),$value));
?>
phydeaux ¶
16 years ago
Scratchy's version still doesn't work like the definition describes. Here's one that can take a mixed variable as the second parameter, defaulting to an empty string if it's not specified. Don't know if this is exactly how the function works in later versions but it's at least a lot closer.
function array_fill_keys($target, $value = '') {
if(is_array($target)) {
foreach($target as $key => $val) {
$filledArray[$val] = is_array($value) ? $value[$key] : $value;
}
}
return $filledArray;
}
This works for either strings or numerics, so if we have
$arr1 = array(0 => 'abc', 1 => 'def');
$arr2 = array(0 => 452, 1 => 128);
$arr3 = array(0 => 'foo', 1 => 'bar');
then
array_fill_keys($arr1,$arr2)
returns: [abc] => 452, [def] => 128
array_fill_keys($arr1,0)
returns: [abc] => 0, [def] => 0
array_fill_keys($arr2,$arr3)
returns: [452] => foo, [128] => bar
array_fill_keys($arr3,'BLAH')
returns: [foo] => BLAH, [bar] => BLAH
and array_fill_keys($arr1)
returns: [abc] =>, [def] =>
ntd at entidi dot it ¶
9 years ago
To remove arbitrary keys from an associative array:
<?php
function nuke_keys($keys, $array) {
return array_diff_key($array, array_fill_keys($keys, 0));
}
$array = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
$keys = array('red', 'purple');
print_r(nuke_keys($keys, $array));
?>
The above snippet will return:
Array
(
[blue] => 1
[green] => 3
)
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
)
taylanaktepe at yahoo dot com ¶
10 years ago
$keys = array(1, 2, 3);
// Fill it with value.
$keys = array_fill_keys($keys, 'banana');
print_r($keys);
// Fill it different value.
$apples = array_fill_keys(array_keys($keys), 'apple');
print_r($apples);
// Output:
Array (
[1] => banana
[2] => banana
[3] => banana
)
Array (
[1] => apple
[2] => apple
[3] => apple
)
