php - Codeigniter 关联数组 - 在 foreach 循环中更改数组名称

Question

我已经为 codeigniter 表单设置了关联数组，并且遇到了围绕数据进行 foreach 循环的问题。

我有这段代码 - 我现在刚刚意识到我正在将变量名 $array_name 重新声明为数组而不是字符串，这就是这个代码不起作用的原因:

foreach ($search as $search_term){
$count++;
$array_name = '$search'.$count;

$array_name = array(
        'name'  => 'search'.$count,
        'id'    => 'search'.$count,
        'value' => set_value('search'.$count, $search_term),
        'maxlength' => 80,
        'size'  => 30,
        'class' => 'text-input',
);

}

然而，数组名称被记录为 $array_name 而不是 $search1，所以我显然做错了什么，我希望有人能指出我正确的方向!

我也尝试过这个:

foreach ($search as $search_term){
$count++;
$array_name = '$search'.$count;

'search'.$count = array(
        'name'  => 'search'.$count,
        'id'    => 'search'.$count,
        'value' => set_value('search'.$count, $search_term),
        'maxlength' => 80,
        'size'  => 30,
        'class' => 'text-input',
);

}

这就是我正在寻找的最终结果，但总共有六个:

$search1 = array(
        'name'  => 'search'.$count,
        'id'    => 'search'.$count,
        'value' => set_value('search'.$count, $search_term),
        'maxlength' => 80,
        'size'  => 30,
        'class' => 'text-input',
);
$search2 = array(
        'name'  => 'search2',
        'id'    => 'search2',
        'value' => set_value('search2, $search_term),
        'maxlength' => 80,
        'size'  => 30,
        'class' => 'text-input',
);

编辑1:

我刚刚意识到我正在将变量名 $array_name 重新声明为数组而不是字符串，这就是第一个不起作用的原因，但我仍然对如何做有点困惑它。

Answer 1

要使用动态字符串创建变量，请使用 ${'somestring'} =

foreach ($search as $search_term){
    $count++;
    $array_name = '$search'.$count;

    ${'search'.$count} = array(
        'name'  => 'search'.$count,
        'id'    => 'search'.$count,
        'value' => set_value('search'.$count, $search_term),
        'maxlength' => 80,
        'size'  => 30,
        'class' => 'text-input',
    );
}

虽然使用关联数组会更好

$searches = array();
foreach ($search as $search_term){
    $count++;
    $array_name = '$search'.$count;

    $searches['search'.$count] = array(
        'name'  => 'search'.$count,
        'id'    => 'search'.$count,
        'value' => set_value('search'.$count, $search_term),
        'maxlength' => 80,
        'size'  => 30,
        'class' => 'text-input',
    );
}

print_r( $searches );