Question

$data已

stdClass Object
(
    [class] => srt-fields
    [rules_field_1] => 1
    [rules_condition_1] => 0
    [rules_value_1] => text
    [rules_field_2] => 3
    [rules_condition_2] => 1
    [rules_value_2] => another_text
    ...
)

现在我有另一个数组$newdata，我需要索引$newdata['rules']，以便它应该是这样的：

$newdata['rules'] => array(
             [field] => 1,
             [condition] => 0,
             [value] => text
           ),
           array(
              [field]=> 3,
              [condition] =>1,
              [value] => another_text
           ),
           ...

谢谢！

Answer 1

您可以像数组一样迭代对象的属性：

$newdata['rules']=[];
foreach ($data as $key => $value) {
    if (substr($key,0,6)=='rules_') {
        // split key using '_'
        $parts = explode('_',$key);
        // get the 'name'
        $name = $parts[1] ;
        // get the index (-1 to be 0 based)
        $idx = $parts[2] - 1;
        // store data in new array
        $newdata['rules'][$idx][$name] = $value;
    }
}
print_r($newdata);

输出：

Array
(
    [rules] => Array
        (
            [0] => Array
                (
                    [field] => 1
                    [condition] => 0
                    [value] => text
                )

            [1] => Array
                (
                    [field] => 3
                    [condition] => 1
                    [value] => another_text
                )

        )

)

Answer 2

这是工作代码，

$data = [
    "class"             => "srt-fields",
    "rules_field_1"     => "1",
    "rules_condition_1" => "0",
    "rules_value_1"     => "text",
    "rules_field_2"     => "3",
    "rules_condition_2" => "1",
    "rules_value_2"     => "another_text",
];
$result = [];
foreach ($data as $k => $v) {
    $num = filter_var($k, FILTER_SANITIZE_NUMBER_INT);
    if (!empty($num)) {
        $result['rules'][$num][(str_replace(['rules_', '_'], '', preg_replace('/[0-9]+/', '', $k)))] = $v;
    }
}
$result['rules'] = array_values($result['rules']);
print_r($result);

str_replace - 用替换字符串

替换所有出现的搜索字符串

filter_var - 使用指定的过滤器过滤变量

preg_replace - 执行正则表达式搜索并替换

str_replace - 用替换字符串

替换所有出现的搜索字符串

以下是demo。

Answer 3

绝对不要为此任务使用正则表达式 - 因为它是不必要的资源开销。分解下划线上的键，并使用各个组件在输出数组中构建多级键。

代码：（Demo）

$data = (object)[
    "class"             => "srt-fields",
    "rules_field_1"     => "1",
    "rules_condition_1" => "0",
    "rules_value_1"     => "text",
    "rules_field_2"     => "3",
    "rules_condition_2" => "1",
    "rules_value_2"     => "another_text"
];

foreach ($data as $key => $value) {
    $bits = explode('_',$key);  // this will produce a 1-element array from `class` and a 3-element array from others
    if (isset($bits[2])) {      // if element [2] exists, then process the qualifying data
        $newdata[$bits[0]][$bits[2]-1][$bits[1]] = $value;
        //                         ^^- make zero based
    }
}
var_export($newdata);

输出：

array (
  'rules' => 
  array (
    0 => 
    array (
      'field' => '1',
      'condition' => '0',
      'value' => 'text',
    ),
    1 => 
    array (
      'field' => '3',
      'condition' => '1',
      'value' => 'another_text',
    ),
  ),
)

我使用-1使输出键类似于从零开始/索引的数组。如果您的字段可能没有连续排序，则可以删除-1并在循环后写入$newdata['rules'] = array_values($newdata['rules']);。

Answer 4

pageIndex

您可以尝试使用此代码。请忽略语法错误，因为我没有尝试过这段代码，但它应该会给你结果。

添加到另一个数组，从字符串中修剪几个字符

4 个答案: