来自 array_slice的文档，您要做的就是给array_slice一个偏移量和一个长度.

From the documentation for array_slice, all you have to do is give array_slice an offset and a length.

在您的情况下:

$firsthalf = array_slice($original, 0, 1200);
$secondhalf = array_slice($original, 1200);

换句话说，这段代码告诉array_slice:

In other words, this code is telling array_slice:

take the first 1200 records;
then, take all the records starting at index 1200;

由于索引1200是项目1201，因此这应该是您所需要的.

Since index 1200 is item 1201, this should be what you need.