我有个问题，希望有人能在这里帮我
我有一个类似的php数组
Array
(
[0] => Array
(
[0] => AJP
[1] => PR4 125 Enduro / SM
[2] => 125 c.c.
)
[1] => Array
(
[0] => DUCATI
[1] => YR 125 Desert
[2] => 125 c.c.
)
[2] => Array
(
[0] => GAS GAS
[1] => Endurocross TT 80
[2] => 80 c.c.
)
[3] => Array
(
[0] => GAS GAS
[1] => EC 125 Six Days 2T
[2] => 125 c.c.
)
[4] => Array
(
[0] => GAS GAS
[1] => EC 125 R
[2] => 125 c.c.
)
[5] => Array
(
[0] => GAS GAS
[1] => Enducross EC 125
[2] => 125 c.c.
)
[6] => Array
(
[0] => GAS GAS
[1] => Enducross HX 125
[2] => 125 c.c.
)
[7] => Array
(
[0] => GAS GAS
[1] => Enducross TT 125
[2] => 125 c.c.
)
[8] => Array
(
[0] => GAS GAS
[1] => MC 125
[2] => 125 c.c.
)
[9] => Array
(
[0] => GAS GAS
[1] => Enducross EC 200
[2] => 200 c.c.
)
[10] => Array
(
[0] => GAS GAS
[1] => EC 200 Six Days 2T
[2] => 200 c.c.
)
[11] => Array
(
[0] => GAS GAS
[1] => EC 250 2T / EC 250 E 2T
[2] => 250 c.c.
)
[12] => Array
(
[0] => GAS GAS
[1] => EC 250 4T / Six Days 2T
[2] => 250 c.c.
)
[13] => Array
(
[0] => GAS GAS
[1] => EC 250 4T R / EC 250 R
[2] => 250 c.c.
)
[14] => Array
(
[0] => GAS GAS
[1] => Enducross TT 250
[2] => 250 c.c.
)
[15] => Array
(
[0] => GAS GAS
[1] => FSE EC 250 4T
[2] => 250 c.c.
)
[16] => Array
(
[0] => GAS GAS
[1] => MC 250
[2] => 250 c.c.
)
[17] => Array
(
[0] => GAS GAS
[1] => EC 300 / EC 300 Nanbolin
[2] => 300 c.c.
)
[18] => Array
(
[0] => GAS GAS
[1] => EC 300 R
[2] => 300 c.c.
)
[19] => Array
(
[0] => GAS GAS
[1] => EC 300 Six Days 2T
[2] => 300 c.c.
)
[20] => Array
(
[0] => GAS GAS
[1] => Enducross EC 400 FSE
[2] => 400 c.c.
)
[21] => Array
(
[0] => GAS GAS
[1] => SM 450 FSR
[2] => 450 c.c.
)
[22] => Array
(
[0] => GAS GAS
[1] => Enducross EC 450 FSE
[2] => 450 c.c.
)
[23] => Array
(
[0] => GAS GAS
[1] => EC 450 4T R
[2] => 450 c.c.
)
[24] => Array
(
[0] => GAS GAS
[1] => FSE 450 SM
[2] => 450 c.c.
)
[25] => Array
(
[0] => GAS GAS
[1] => Pampera 450 4T
[2] => 450 c.c.
)
[26] => Array
(
[0] => GAS GAS
[1] => EC 515 FSR 4T
[2] => 515 c.c.
)
)
我想像一样格式化它
Array
(
[AJP] => Array
(
[1] => PR4 125 Enduro / SM
[2] => 125 c.c.
)
[DUCATI] => Array
(
[1] => YR 125 Desert
[2] => 125 c.c.
)
[GAS GAS] => Array
(
[0] => Array
(
[1] => EC 125 Six Days 2T
[2] => 125 c.c.
)
[1] => Array
(
[1] =>EC 125 Six Days 2T
[2] => 125 c.c.
)
[2] => Array
(
[1] => EC 125 Six Days 2T
[2] => 125 c.c.
)
)
)因此，品牌名称就像AJP一样，DUCATI OR GAS GAS成为关键，其中的所有型号都变成了多阵列。
我没有测试这个代码；写得很快，所以可能会有一些错误，但这里有一个粗略的近似值。假设您的数组名为$arX:
$arNew = array();
foreach ($arX as $x) {
$newX = array();
for ($i=1; $i<count($x); $i++) {
$newX[] = $x[$i];
}
$arNew[$x[0]] = $newX;
}
return $arNew;
注意：这实际上会重新索引从[0]而不是[1]开始的新数组。如果维护新索引的顺序至关重要，则需要修改代码以使用数组中的$i值，但在0处重新编号似乎更有意义。
$arrNew = array();
foreach ($arrCurr as $arr) {
$arrTemp = array();
for ($i=1; $i < count($arr); $i++) {
$arrTemp[] = $arr[$i];
}
$arrNew[$arr[0]][] = $arrTemp;
}
print_r($arrNew);
PHPIddle：http://phpfiddle.org/main/code/4mi-ap0
$raw = array(
array('ajp', 1, 2),
array('ajp', 4, 5),
array('ducati', 3, 4)
);
$prep = array();
foreach($raw as $key => $value) {
$type = $value[0];
$prep[$type][] = $raw[$key];
/*if($type === 'ajp') {
$prep['ajp'][] = $raw[$key];
}
else if($type === 'ducati') {
$prep['ducati'][] = $raw[$key];
}*/
}
echo '<pre>';
print_r($prep);
echo '</pre>';
结果：
Array
(
[ajp] => Array
(
[0] => Array
(
[0] => ajp
[1] => 1
[2] => 2
)
[1] => Array
(
[0] => ajp
[1] => 4
[2] => 5
)
)
[ducati] => Array
(
[0] => Array
(
[0] => ducati
[1] => 3
[2] => 4
)
)
)
给定$keys=数组（'a'，'b'，'c'，…）和您的数组$list，然后执行以下操作：
$list = array_combine($keys, array_values($list));
这看起来很简单，但array_values会生成数组的完整副本，因此可能会出现空间问题。我们在这里所做的只是让php为我们进行循环，而不是消除循环。我很想做一些更像的事情
foreach ($list as $k => $v) {
unset ($list[$k]);
$new_key = *some logic here*
$list[$new_key] = $v;
}