PHP合并数组生成3组分组结构时的键覆盖问题求助

Got it, let's break down why your current code is causing key overwrites and fix it to get the 3 grouped objects you need.

The Root Problem #

Your original code loops through all 33 items in $ArrayObj and assigns values directly to $Array2[$Array1[$key]]. Since every 11 items share the same left_side_data values (your keys), each subsequent duplicate key overwrites the previous value. That's why you end up with only 1 set of 11 key-value pairs instead of 3 separate groups.

Solution: Group First, Then Build Key-Value Pairs #

The fix is simple: split your original 33-item array into 3 groups of 11 first, then build a key-value array for each group. This way, duplicate keys are contained within their own group and won't overwrite each other across groups.

Here's the revised code:

// Your original 33-object array
$ArrayObj = [...]; 

// Define the size of each group (11 items per group)
$groupSize = 11;
$Array2 = [];

// Split the original array into 3 groups of 11 items each
$groupedObjects = array_chunk($ArrayObj, $groupSize);

// Loop through each group to build the key-value pairs
foreach ($groupedObjects as $group) {
    // Use array_column to extract keys and values, then combine them
    $keys = array_column($group, 'left_side_data');
    $values = array_column($group, 'data');
    $Array2[] = array_combine($keys, $values);
}

return $Array2;

What This Does #

1. array_chunk($ArrayObj, 11): Takes your 33-item array and splits it into 3 sub-arrays, each containing exactly 11 objects.
2. array_column: Extracts all left_side_data values (to use as keys) and all data values (to use as values) from each group.
3. array_combine: Merges the extracted keys and values into a single associative array for each group.
4. $Array2[] = ...: Adds each group's associative array to the final output, resulting in an array of 3 objects (each with 11 key-value pairs).

Alternative: Manual Loop (If You Prefer) #

If you want to avoid array_column and array_combine for more explicit control, you can use nested loops:

$ArrayObj = [...];
$groupSize = 11;
$Array2 = [];
$groupedObjects = array_chunk($ArrayObj, $groupSize);

foreach ($groupedObjects as $group) {
    $groupData = [];
    foreach ($group as $item) {
        $groupData[$item['left_side_data']] = $item['data'];
    }
    $Array2[] = $groupData;
}

return $Array2;

Both approaches will give you the exact 3-group structure you're looking for, with no key overwrites.

内容的提问来源于stack exchange，提问作者Murlidhar Fichadia