array_diff
This function does the same as:
<?php
$array = array_combine($keys,array_fill(0,count($keys),$value));
?>
array_fill_keys
(PHP 5 >= 5.2.0)
array_fill_keys — Fill an array with values, specifying keys
说明
array array_fill_keys
( array $keys
, mixed $value
)
Fills an array with the value of the value parameter, using the values of the keys array as keys.
参数
- keys
-
Array of values that will be used as keys
- value
-
Either an string or an array of values
返回值
Returns the filled array
范例
Example#1 array_fill_keys() example
<?php
$keys = array('foo', 5, 10, 'bar');
$a = array_fill_keys($keys, 'banana');
print_r($a);
?>
上例将输出：
Array ( [foo] => banana [5] => banana [10] => banana [bar] => banana )
add a note
User Contributed Notesarray_fill_keys
matrebatre
20-Jun-2008 10:28
20-Jun-2008 10:28
phydeaux
15-May-2008 01:26
15-May-2008 01:26
Scratchy's version still doesn't work like the definition describes. Here's one that can take a mixed variable as the second parameter, defaulting to an empty string if it's not specified. Don't know if this is exactly how the function works in later versions but it's at least a lot closer.
function array_fill_keys($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
03-May-2008 05:18
03-May-2008 05:18
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, $arr2);
returns:
abc => 452, def =>128
bananasims at hotmail dot com
19-Dec-2006 09:03
19-Dec-2006 09:03
Some of the versions do not have this function.
I try to write it myself.
You may refer to my script below
function array_fill_keys($array, $values) {
if(is_array($array)) {
foreach($array as $key => $value) {
$arraydisplay[$array[$key]] = $values;
}
}
return $arraydisplay;
}