数组 函数
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array_fill_keys

(PHP 5 >= 5.2.0)

array_fill_keys — 使用指定的键和值填充数组

说明

array array_fill_keys ( array $keys , mixed $value )

使用 value 参数的值作为值，使用 keys 数组的值作为键来填充一个数组。

参数

keys

使用该数组的值作为键。非法值将被转换为字符串。

value

填充使用的值。

返回值

返回填充后的数组。

范例

Example #1 array_fill_keys() 范例

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

以上例程会输出：

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

参见

数组 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: 使用指定的键和值填充数组

用户评论:

matrebatre (20-Jun-2008 03:28)

This function does the same as:
<?php
$array = array_combine($keys,array_fill(0,count($keys),$value));
?>

phydeaux (14-May-2008 06:26)

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] =>

Scratchy (02-May-2008 10:18)

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 (19-Dec-2006 01:03)

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;
}