array_diff
<?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)
array_fill_keys — 使用指定的键和值填充数组
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
)
add a note
User Contributed Notes
array_fill_keys
sergli at nigma dot ru
25-May-2012 05:53
matrebatre
20-Jun-2008 01:28
This function does the same as:
<?php
$array = array_combine($keys,array_fill(0,count($keys),$value));
?>
phydeaux
14-May-2008 04:26
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 08:18
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, $arr2);
returns:
abc => 452, def =>128
bananasims at hotmail dot com
18-Dec-2006 10:03
Some of the versions do not have this function.
I try to write it myself.
You may refer to my script below
function array_fill_keys($array, $values) {
if(is_array($array)) {
foreach($array as $key => $value) {
$arraydisplay[$array[$key]] = $values;
}
}
return $arraydisplay;
}