多维数组中的array_slice？

Question

我在 php 中有一个这样的数组：

Array
(
    [0] => Array
        (
              [915] => 1
              [1295] => 1
              [1090] => 1
              [1315] => 0.93759357774
              [128] => 0.93759357774
              [88] => 0.731522789561
              [1297] => 0.731522789561
              [1269] => 0.525492880722
              [1298] => 0.525492880722
              [121] => 0.519133966069
         )
   [1] => Array
       (
              [585] => 1
              [1145] => 1
              [1209] => 1
              [375] => 1
              [1144] => 1
              [913] => 1
              [1130] => 0.996351158355
              [215] => 0.937096401456
              [1296] => 0.879373313559
              [30] => 0.866473953643
              [780] => 0.866473953643
              [1305] => 0.866473953643
              [1293] => 0.866473953643
       )

) 

如何获取每个数组的第 1-5 行子数组，如下所示：

结果：

Array
(
    [0] => Array
        (
              [915] => 1
              [1295] => 1
              [1090] => 1
              [1315] => 0.93759357774
              [128] => 0.93759357774
         )
   [1] => Array
       (
              [585] => 1
              [1145] => 1
              [1209] => 1
              [375] => 1
              [1144] => 1
       )

)

Answer 1

$multid_array = array(/* Your Multidimensional array from above*/);

$sliced_array = array();  //setup the array you want with the sliced values.

//loop though each sub array and slice off the first 5 to a new multidimensional array
foreach ($multid_array as $sub_array) {
    $sliced_array[] = array_slice($sub_array, 0, 5);
}

然后 $sliced_array 将包含您想要的输出。

Answer 2

• 遍历数组。
• 通过引用读取值。
• 从偏移量5 删除键值直到 结束。您不需要收集返回值，因为我们使用的是对原始数组的引用。

.

foreach($mainArray as $key => &$value) {
  array_splice($value,5);
}

Working ideone link

Answer 3

您可能想查看 php 函数 array_splice。

http://no.php.net/manual/en/function.array-slice.php