array_replace_recursive
Yep, thinking about it replacing from back to front, this works a trick!
here's a quick repalcement for PHP <=5.3
<?php
if (!function_exists('array_replace')){ function array_replace(){
$array=array();
$n=func_num_args();
while ($n-- >0) {
$array+=func_get_arg($n);
}
return $array;
}}
?>
array_replace
(PHP 5 >= 5.3.0)
array_replace — 渡された配列の要素を置き換える
説明
array array_replace
( array &$array
, array &$array1
[, array &$...
] )
array_replace() は、 最初の配列の値をそれ以降の配列の同じ要素の値で置き換えます。 最初の配列のキーと同じキーが 2 番目の配列にあれば、 2 番目の配列の値が最初の配列の値を上書きします。 2 番目の配列に存在するキーが最初の配列に存在しなければ、 そのキーが新たに最初の配列内に作られます。 最初の配列にしか存在しないキーについては何も変わりません。 置き換え用の配列が複数渡された場合は渡した順に処理を行い、 後から渡した配列の値のほうが優先されます。
array_replace() は再起的な処理を行いません。 2 番目の配列の値がどんな型であっても、最初の配列の値を置き換えます。
パラメータ
- array
-
要素を置き換えたい配列。
- array1
-
置き換えたい要素を含む配列。
- ...
-
置き換えたい要素を含む、さらに別の配列。 後から渡した配列の値のほうが優先されます。
返り値
配列を返します。エラーが発生した場合は NULL を返します。
例
例1 array_replace() の例
<?php
$base = array("orange", "banana", "apple", "raspberry");
$replacements = array(0 => "pineapple", 4 => "cherry");
$replacements2 = array(0 => "grape");
$basket = array_replace($base, $replacements, $replacements2);
print_r($basket);
?>
上の例の出力は以下となります。
Array
(
[0] => grape
[1] => banana
[2] => apple
[3] => raspberry
[4] => cherry
)
add a note
User Contributed Notes
array_replace
w_barath at hotmail dot com
06-Aug-2011 08:13
sun at drupal dot org
27-May-2011 11:42
Instead of calling this function, it's often faster and simpler to do this instead:
<?php
$array_replaced = $array2 + $array1;
?>
If you need references to stay intact:
<?php
$array2 += $array1;
?>
polecat at p0lecat dot com
29-Nov-2010 10:02
I got hit with a noob mistake. :)
When the function was called more than once, it threw a function redeclare error of course. The enviroment I was coding in never called it more than once but I caught it in testing and here is the fully working revision. A simple logical step was all that was needed.
With PHP 5.3 still unstable for Debian Lenny at this time and not knowing if array_replace would work with multi-dimensional arrays, I wrote my own. Since this site has helped me so much, I felt the need to return the favor. :)
<?php
// Polecat's Multi-dimensional array_replace function
// Will take all data in second array and apply to first array leaving any non-corresponding values untouched and intact
function polecat_array_replace( array &$array1, array &$array2 ) {
// This sub function is the iterator that will loop back on itself ad infinitum till it runs out of array dimensions
if(!function_exists('tier_parse')){
function tier_parse(array &$t_array1, array&$t_array2) {
foreach ($t_array2 as $k2 => $v2) {
if (is_array($t_array2[$k2])) {
tier_parse($t_array1[$k2], $t_array2[$k2]);
} else {
$t_array1[$k2] = $t_array2[$k2];
}
}
return $t_array1;
}
}
foreach ($array2 as $key => $val) {
if (is_array($array2[$key])) {
tier_parse($array1[$key], $array2[$key]);
} else {
$array1[$key] = $array2[$key];
}
}
return $array1;
}
?>
[I would also like to note] that if you want to add a single dimensional array to a multi, all you must do is pass the matching internal array key from the multi as the initial argument as such:
<?php
$array1 = array( "berries" => array( "strawberry" => array( "color" => "red", "food" => "desserts"), "dewberry" = array( "color" => "dark violet", "food" => "pies"), );
$array2 = array( "food" => "wine");
$array1["berries"]["dewberry"] = polecat_array_replace($array1["berries"]["dewberry"], $array2);
?>
This is will replace the value for "food" for "dewberry" with "wine".
The function will also do the reverse and add a multi to a single dimensional array or even a 2 tier array to a 5 tier as long as the heirarchy tree is identical.
I hope this helps atleast one person for all that I've gained from this site.
polecat at p0lecat dot com
29-Nov-2010 09:57
I would like to add to my previous note about my polecat_array_replace function that if you want to add a single dimensional array to a multi, all you must do is pass the matching internal array key from the multi as the initial argument as such:
$array1 = array( "berries" => array( "strawberry" => array( "color" => "red", "food" => "desserts"), "dewberry" = array( "color" => "dark violet", "food" => "pies"), );
$array2 = array( "food" => "wine");
$array1["berries"]["dewberry"] = polecat_array_replace($array1["berries"]["dewberry"], $array2);
This is will replace the value for "food" for "dewberry" with "wine".
The function will also do the reverse and add a multi to a single dimensional array or even a 2 tier array to a 5 tier as long as the heirarchy tree is identical.
I hope this helps atleast one person for all that I've gained from this site.
mail at romansklenar dot cz
10-Dec-2009 07:01
To get exactly same result like in PHP 5.3, the foreach loop in your code should look like:
<?php
...
$count = func_num_args();
for ($i = 1; $i < $count; $i++) {
...
}
...
?>
Check on this code:
<?php
$base = array('id' => NULL, 'login' => NULL, 'credit' => NULL);
$arr1 = array('id' => 2, 'login' => NULL, 'credit' => 5);
$arr2 = array('id' => NULL, 'login' => 'john.doe', 'credit' => 100);
$result = array_replace($base, $arr1, $arr2);
/*
correct output:
array(3) {
"id" => NULL
"login" => string(8) "john.doe"
"credit" => int(100)
}
your output:
array(3) {
"id" => int(2)
"login" => NULL
"credit" => int(5)
}
*/
?>
Function array_replace "replaces elements from passed arrays into the first array" -- this means replace from top-right to first, then from top-right - 1 to first, etc, etc...
tufan dot oezduman at googlemail dot com
06-Nov-2009 04:19
a little enhancement to dyer85 at gmail dot com's function below:
<?php
if (!function_exists('array_replace'))
{
function array_replace( array &$array, array &$array1, $filterEmpty=false )
{
$args = func_get_args();
$count = func_num_args()-1;
for ($i = 0; $i < $count; ++$i) {
if (is_array($args[$i])) {
foreach ($args[$i] as $key => $val) {
if ($filterEmpty && empty($val)) continue;
$array[$key] = $val;
}
}
else {
trigger_error(
__FUNCTION__ . '(): Argument #' . ($i+1) . ' is not an array',
E_USER_WARNING
);
return NULL;
}
}
return $array;
}
}
?>
this will allow you to "tetris-like" merge arrays:
<?php
$a= array(
0 => "foo",
1 => "",
2 => "baz"
);
$b= array(
0 => "",
1 => "bar",
2 => ""
);
print_r(array_replace($a,$b, true));
?>
results in:
Array
(
[0] => foo
[1] => bar
[2] => baz
)
dyer85 at gmail dot com
28-Jul-2009 09:45
For a backward compatible alternative, you might try something like this:
<?php
if (!function_exists('array_replace'))
{
function array_replace( array &$array, array &$array1 )
{
$args = func_get_args();
$count = func_num_args();
for ($i = 0; $i < $count; ++$i) {
if (is_array($args[$i])) {
foreach ($args[$i] as $key => $val) {
$array[$key] = $val;
}
}
else {
trigger_error(
__FUNCTION__ . '(): Argument #' . ($i+1) . ' is not an array',
E_USER_WARNING
);
return NULL;
}
}
return $array;
}
}
?>