合并后的两个数组,如array_merge($array1,$array2);它变成这样,
array(10) {
[0]=>
object(stdClass) (2) {
["id"]=>
string(1) "1"
["text"]=>
string(5) "one"
}
[1]=>
object(stdClass) (2) {
["id"]=>
string(1) "2"
["text"]=>
string(8) "two"
}
[2]=>
object(stdClass) (2) {
["id"]=>
string(1) "3"
["text"]=>
string(4) "three"
}
[3]=>
object(stdClass) (2) {
["id"]=>
string(1) "4"
["text"]=>
string(8) "four"
}
[4]=>
object(stdClass) (2) {
["id"]=>
string(1) "5"
["text"]=>
string(3) "five"
}
[5]=>
object(stdClass) (2) {
["id"]=>
string(1) "1"
["unit"]=>
string(1) "0"
}
[6]=>
object(stdClass) (2) {
["id"]=>
string(1) "2"
["unit"]=>
int(0)
}
[7]=>
object(stdClass) (2) {
["id"]=>
string(1) "3"
["unit"]=>
int(0)
}
[8]=>
object(stdClass) (2) {
["id"]=>
string(1) "4"
["unit"]=>
string(1) "0"
}
[9]=>
object(stdClass) (2) {
["id"]=>
string(1) "5"
["unit"]=>
int(1)
}
}
这意味着两个数组都是字面上合并的.但我想要的是因为两个数组都有一个名为id的共同属性,它具有相同的值,
它应该变成:
array(2) {
[0]=>
object(stdClass) (2) {
["id"]=>
string(1) "1"
["text"]=>
string(5) "one"
["unit"]=>
int(0)
}
[1]=>
object(stdClass) (2) {
["id"]=>
string(1) "2"
["text"]=>
string(8) "two"
["unit"]=>
int(2)
}
}
请注意,arra1具有id,text而array2具有id,unit
我确实在这里引用了第一个建议使用array_map的答案,但对我来说,我得到的错误是说参数1不是数组.
Combine two array in to single array with common value
编辑:
试过这个(不起作用):
$array1 = array_walk($array1, function(&$value) { $value = (array) $value; })
$array2 = array_walk($array2, function(&$value) { $value = (array) $value; })
function modifyArray($a, $b)
{
if (!empty($a) && !empty($b)) {
return array_merge($a, $b);
} else if (!empty($a) && empty($b)) {
return $a;
} else if (empty($a) && !empty($b)) {
return $b;
}
}
$new = array_map("modifyArray", $array1, $array2);
var_dump($new);
最佳答案 将对象转换为数组后,合并两个数组.我将把这个数组称为$poorly_merged并从那里开始.在我的演示中,我稍微改组了这个数组,以证明我的代码片段无论子数组的顺序如何都能正常工作.我的代码也保留了值类型(整数/字符串).我不知道它是否是最短的解决方案,但我相信它会适用于您的情况.
Demo:
<?php
$poorly_merged=array(
array("id"=>"5","unit"=>1),
array("id"=>"3","text"=>"three"),
array("id"=>"1","text"=>"one"),
array("id"=>"2","text"=>"two"),
array("id"=>"4","text"=>"four"),
array("id"=>"5","text"=>"five"),
array("id"=>"3","unit"=>0),
array("id"=>"1","unit"=>"0"),
array("id"=>"2","unit"=>0),
array("id"=>"4","unit"=>"0")
);
$ids_array=array_unique(array_column($poorly_merged,"id")); // create array of unique ids
sort($ids_array); // only necessary if ids are not in order already
$x=0;
foreach($ids_array as $id){
$well_merged[$x]=array(); // must be declared so array_merge works later
$q=array("id"=>$id); // declare the identifying key-value pair (needle) to match
// create an array only of rows where $q's key-value pairs exist
$qualifying_array=array_filter(
$poorly_merged, // haystack
function($val)use($q){ // using needle
if(sizeof(array_intersect_assoc($val,$q))==sizeof($q)){ // if #found = #needles
return $val; // it's a keeper
}
},
ARRAY_FILTER_USE_BOTH // send key-value pairs through the function as $val
);
foreach($qualifying_array as $to_be_flattened){
$well_merged[$x]=array_merge($well_merged[$x],$to_be_flattened); // merge matches, overwriting duplicate id
}
++$x;
}
echo "<pre>";
var_export($well_merged);
echo "</pre>";
输出:
array (
0 =>
array (
'id' => '1',
'text' => 'one',
'unit' => '0',
),
1 =>
array (
'id' => '2',
'text' => 'two',
'unit' => 0,
),
2 =>
array (
'id' => '3',
'text' => 'three',
'unit' => 0,
),
3 =>
array (
'id' => '4',
'text' => 'four',
'unit' => '0',
),
4 =>
array (
'id' => '5',
'unit' => 1,
'text' => 'five',
),
)