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array_merge_recursive (PHP 4 >= 4.0.1, PHP 5) array_merge_recursive -- 递归地合并两个或多个数组 说明array array_merge_recursive ( array array1, array array2 [, array ...])
array_merge_recursive() 将两个或多个数组的单元合并起来，一个数组中的值附加在前一个数组的后面。返回作为结果的数组。
如果输入的数组中有相同的字符串键名，则这些值会被合并到一个数组中去，这将递归下去，因此如果一个值本身是一个数组，本函数将按照相应的条目把它合并为另一个数组。然而，如果数组具有相同的数组键名，后一个值将不会覆盖原来的值，而是附加到后面。
例子 1. array_merge_recursive() 例子 |
<?php
$ar1 = array ("color" => array ("favorite" => "red"), 5);
$ar2 = array (10, "color" => array ("favorite" => "green", "blue"));
$result = array_merge_recursive ($ar1, $ar2);
?>
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$result 成为：
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Array
(
[color] => Array
(
[favorite] => Array
(
[0] => red
[1] => green
)
[0] => blue
)
[0] => 5
[1] => 10
)
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参见 array_merge()。
 add a note
User Contributed Notes
array_merge_recursive
shemari75 at mixmail dot com
19-Dec-2003 01:22
Here's a function to recursively merge any number of any-dimensional
arrays.
It actually works in quite a similar way as
array_merge_recursive does, but with two major differences:
- Later
elements overwrite previous ones having the same keys.
- Numeric keys
are not appended. Instead, they are converted into associative ones, and
therefore overwritten as stated above.
Usage:
array
array_merge_n(array array1, array array2[, array ...])
<?php
/**
* Merges two arrays of any dimension
*
*
This is the process' core!
* Here each array is merged with the
current resulting one
*
* @access private
*
@author Chema Barcala Calveiro <shemari75@mixmail.com>
*
@param array $array Resulting array - passed by reference
*
@param array $array_i Array to be merged - passed by reference
*/
function array_merge_2(&$array, &$array_i) {
// For each element of the array (key => value):
foreach
($array_i as $k => $v) {
// If the value itself is an
array, the process repeats recursively:
if (is_array($v))
{
if (!isset($array[$k])) {
$array[$k] = array();
}
array_merge_2($array[$k], $v);
// Else, the value is
assigned to the current element of the resulting array:
}
else {
if (isset($array[$k]) &&
is_array($array[$k])) {
$array[$k][0] = $v;
} else {
if (isset($array) &&
!is_array($array)) {
$temp = $array;
$array = array();
$array[0] =
$temp;
}
$array[$k] = $v;
}
}
}
}
/**
* Merges any number of arrays of any dimension
*
* The
arrays to be merged are passed as arguments to the function,
*
which uses an external function (array_merge_2) to merge each of them
* with the resulting one as it's being constructed
*
*
@access public
* @author Chema Barcala Calveiro
<shemari75@mixmail.com>
* @return array
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array_map
