php 将数组添加到循环内的多维数组
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Adding arrays to multi-dimensional array within loop
提问by Leopold Stotch
I am attempting to generate a multi-dimensional array with each sub array representing a row I want to insert into my DB. The reason for this is so I can use CodeIgniters batch_insert function to add each row to the DB.
我正在尝试生成一个多维数组，每个子数组代表我想插入到我的数据库中的一行。这样做的原因是我可以使用 CodeIgniters batch_insert 函数将每一行添加到数据库中。
I am attempting to create each sub array within a loop and insert it into a multidimensional array. Google suggested using array_merge, but after using 'print_r' on the multidimensional array with the code below, only the last sub-array is being displayed.
我试图在循环中创建每个子数组并将其插入到多维数组中。Google 建议使用 array_merge，但是在使用下面的代码在多维数组上使用 'print_r' 后，只显示最后一个子数组。
Here is my code:
这是我的代码：
$allplayerdata = array(); //M-D container array
for ($i = 1; $i <= 11; $i++)
{
$playerdata = array(
'player_id' => $this->input->post('player' . $i),
'goals' => $this->input->post('playergoals' . $i),
'player_num' => $i,
'fixture_id' => $this->input->post('fixture_id')
);
//Merge each player row into same array to allow for batch insert
$allplayerdata = array_merge($allplayerdata, $playerdata);
}
print_r($allplayerdata);
Can anyone spot where I'm going wrong? Help is appreciated!
谁能发现我哪里出错了？帮助表示赞赏！
回答by Mark Biesheuvel
This is because array_mergeis not the right operation for this situation. Since all the $playerdataarrays have the same keys, the values are overridden.
这是因为array_merge对于这种情况不是正确的操作。由于所有$playerdata数组都具有相同的键，因此会覆盖这些值。
You want to use array_pushto append to an array. This way you will get an array of $playerdataarrays.
您想用于array_push附加到数组。这样你就会得到一个数组$playerdata数组。
array_push($allplayerdata, $playerdata);
Which is equivalent to adding an element with the square bracket syntax
相当于用方括号语法添加元素
$allplayerdata[] = $playerdata;
回答by JK.
This will add the second array to the first array: A mergeis something different.
这会将第二个数组添加到第一个数组：合并是不同的。
$allplayerdata[] = $playerdata;