array_fill_keys

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

    array_fill_keys — Fill an array with values, specifying keys

    Descrizione

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

    Fills an array with the value of the value parameter, using the values of the keys array as keys.

    Elenco dei parametri

    keys

    Array of values that will be used as keys. Illegal values for key will be converted to string.

    value

    Value to use for filling

    Valori restituiti

    Returns the filled array

    Esempi

    Example #1 array_fill_keys() example

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

    Il precedente esempio visualizzerà:

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

    Vedere anche:

    • array_fill() - Riempie un array con i valori specificati
    • array_combine() - Crea un'array utilizzando un'array per le chiavi ed un altro per i suoi valori

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    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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