这是我的数组
Array
(
[0] => Array
(
[0] => Jan 2010
[1] => 65.75
)
[1] => Array
(
[0] => Jan 2010
[1] => 211.05
)
[2] => Array
(
[0] => Jan 2010
[1] => 582.7
)
[3] => Array
(
[0] => Feb 2010
[1] => 136.3
)
[4] => Array
(
[0] => Feb 2010
[1] => 215.32
)
[5] => Array
(
[0] => Feb 2010
[1] => 413.9
)
[6] => Array
(
[0] => Mar 2010
[1] => 156.35
)
[7] => Array
(
[0] => Mar 2010
[1] => 210.54
)
[8] => Array
(
[0] => Mar 2010
[1] => 585.15
)
[9] => Array
(
[0] => Apr 2010
[1] => 126.1
)
[10] => Array
(
[0] => Apr 2010
[1] => 255.47
)
[11] => Array
(
[0] => Apr 2010
[1] => 329.1
)
[12] => Array
(
[0] => May 2010
[1] => 109
)
[13] => Array
(
[0] => May 2010
[1] => 170
)
[14] => Array
(
[0] => May 2010
[1] => 716.7
)
)
有什么办法可以让所有数组在[0]合并中具有相同的值？我希望它是这样的：
Array[0] = (Jan 2010, 65.75, 211.05, 582.7)
Array[1] = (Feb 2010, 136.3, 215.32, 413.9)
依旧......
答案 0 :(得分：3)
我能想到的最接近“简单”（阅读：利用本机PHP功能）正在切换到结果的文本键（关联数组）。从数据建模的角度来看，这也是有意义的，因为在您的示例结果数组中，您正在混合“关键”数据和“值”数据（例如，第一个值承担作为set == bad的标签的责任）。诀窍是使用隐式“push”运算符[]，它将一个新值附加到数组。
foreach($sourceArray as $currentSubArray) {
$resultArray[$currentSubArray[0]][] = $currentSubArray[1];
}
您的结果将如下所示：
Array (
'Jan 2010' => Array (
0 => 65.75,
1 => 211.05,
2 => 582.7,
)
...
)
答案 1 :(得分：1)
这是@ctrahey suggested的变体，它直接在输入数组上运行：
foreach($array as $key => &$entry) {
list($month, $value) = $entry;
if (isset($ptr[$month])) {
$ptr[$month][] = $value;
unset($array[$key]);
} else {
$ptr[$month] = &$entry;
}
}
unset($ptr);
使用示例数据输出：
Array
(
[0] => Array
(
[0] => Jan 2010
[1] => 65.75
[2] => 211.05
[3] => 582.7
)
[3] => Array
(
[0] => Feb 2010
[1] => 136.3
[2] => 215.32
[3] => 413.9
)
[6] => Array
(
[0] => Mar 2010
[1] => 156.35
[2] => 210.54
[3] => 585.15
)
[9] => Array
(
[0] => Apr 2010
[1] => 126.1
[2] => 255.47
[3] => 329.1
)
[12] => Array
(
[0] => May 2010
[1] => 109
[2] => 170
[3] => 716.7
)
)
答案 2 :(得分：0)
这太可怕了，但它有效......
$resarray=Array(
0 => Array(0 => 'Jan 2010',1 => 65.75),
1=> Array(0 => 'Jan 2010',1 => 211.05),
2 => Array(0 => 'Jan 2010',1 => 582.7),
3 => Array(0 => 'Feb 2010',1 => 136.3),
4 => Array(0 => 'Feb 2010',1 => 215.32),
5 => Array(0 => 'Feb 2010',1 => 413.9),
6 => Array(0 => 'Feb 2010',1 => 156.35),
7 => Array(0 => 'Feb 2010',1 => 210.54),
8 => Array(0 => 'Mar 2010',1 => 585.15),
9 => Array(0 => 'Apr 2010',1 => 126.1),
10 => Array(0 => 'Apr 2010',1 => 255.47),
11 => Array(0 => 'Apr 2010',1 => 329.1),
12 => Array(0 => 'May 2010',1 => 109),
13 => Array(0 => 'May 2010',1 => 170),
14 => Array(0 => 'May 2010',1 => 716.7)
);
$CatArray=array();
$FinArray=array();
$count=count($resarray);
for($i=0;$i<$count;$i++){
$index=array_search($resarray[$i][0],$CatArray);
if(is_numeric($index) && $index>=0)
$FinArray[$index][]=$resarray[$i][1];
else{
$CatArray[]=$resarray[$i][0];
$FinArray[]=array($resarray[$i][0],$resarray[$i][1]);
}
}
unset($CatArray);
unset($resarray);
$count=count($FinArray);
for($i=0;$i<$count;$i++){
$resarray[$i]=implode(',',$FinArray[$i]);
}
输出：
Array
(
[0] => Jan 2010,65.75,211.05,582.7
[1] => Feb 2010,136.3,215.32,413.9,156.35,210.54
[2] => Mar 2010,585.15
[3] => Apr 2010,126.1,255.47,329.1
[4] => May 2010,109,170,716.7
)
答案 3 :(得分：0)
actionMerge($inputArray);
function actionMerge($inputArray){
$month = array();
$earn = array();
$parentKey = 0;
$callback = function ($value, $key) use (&$month, &$earn, &$parentKey) {
if(!is_array($value)){
if($key == 0){
if(!in_array($value, $month)){
array_push($month, $value);
$earn[$value] = array();
}
$parentKey = $value;
}elseif($key == 1){
array_push($earn[$parentKey], $value);
}
}
};
array_walk_recursive($inputArray, $callback);
echo 'You should use this array';
var_dump($earn); // group money by month, I recommend you to use it
$Array = array();
foreach($month as $m){
$arr = array($m);
$arr = array_merge($arr, $earn[$m]);
array_push($Array, $arr);
}
echo '...Intead of array result what you expect';
var_dump($Array); // your expect result
}
?>
结果如下：
//You should use this array
array (size=5)
'Jan 2010' =>
array (size=3)
0 => float 65.75
1 => float 211.05
2 => float 582.7
'Feb 2010' =>
array (size=3)
0 => float 136.3
1 => float 215.32
2 => float 413.9
'Mar 2010' =>
array (size=3)
0 => float 156.35
1 => float 210.54
2 => float 585.15
'Apr 2010' =>
array (size=3)
0 => float 126.1
1 => float 255.47
2 => float 329.1
'May 2010' =>
array (size=3)
0 => int 109
1 => int 170
2 => float 716.7
//...Intead of array result what you expect
array (size=5)
0 =>
array (size=4)
0 => string 'Jan 2010' (length=8)
1 => float 65.75
2 => float 211.05
3 => float 582.7
1 =>
array (size=4)
0 => string 'Feb 2010' (length=8)
1 => float 136.3
2 => float 215.32
3 => float 413.9
2 =>
array (size=4)
0 => string 'Mar 2010' (length=8)
1 => float 156.35
2 => float 210.54
3 => float 585.15
3 =>
array (size=4)
0 => string 'Apr 2010' (length=8)
1 => float 126.1
2 => float 255.47
3 => float 329.1
4 =>
array (size=4)
0 => string 'May 2010' (length=8)
1 => int 109
2 => int 170
3 => float 716.7