Question

我有一个这样的数组：

0 = Array('attr' => Array('class' => 'class1'), 'content'=>'class-1-content'),
1 = Array('attr' => Array(), 'content'=>'...'),
2 = Array('attr' => Array('class' => 'whatever'), 'content'=>'...'),
3 = Array('attr' => Array('class' => 'anything'), 'content'=>'...'),
4 = Array('attr' => Array(), 'content'=>'...'),
5 = Array('attr' => Array('class' => 'class2'), 'content'=>'...'),
6 = Array('attr' => Array('key' => 'more-here'), 'content'=>'...'),
7 = Array('attr' => Array('class' => 'class1'), 'content'=>'class-1-again'),
8 = Array('attr' => Array('another-attr' => ''), 'content'=>'...'),
9 = Array('attr' => Array(), 'content'=>'...'),
10 = Array('attr' => Array('class' => 'and-so-on'), 'content'=>'...'),
...

我想创建一个功能，以获取特定的属性（例如，在我的情况下，所有类别等于＆＃39; class1＆＃39;或＆＃39; class2＆＃39;）并将这些属性分组直到任何事情否则＆＃34;开始＆＃34;。基本上是为了创造这样的结果：

0 = Array(type='class1', 'content='class-1-content', block=Array(
    0 = Array('attr' => Array(), 'content'=>'...'),
    1 = Array('attr' => Array('class' => 'whatever'), 'content'=>'...'),
    2 = Array('attr' => Array('class' => 'anything'), 'content'=>'...'),
    3 = Array('attr' => Array(), 'content'=>'...')
),
1 = Array(type='class2', 'content'=>'content-class-2', block=Array( 
    0 = Array('attr' => Array('key' => 'more-here'), 'content'=>'...'),
),
2 = Array(type='class1', 'content'=>'class-1-again', block=Array( 
    0 = Array('attr' => Array('another-attr' => ''), 'content'=>'...'),
    1 = Array('attr' => Array(), 'content'=>'...'),
    2 = Array('attr' => Array('class' => 'and-so-on'), 'content'=>'...')
)

有谁能帮我解决如何以最好的方式做到这一点？很高兴能够创建一个'＃34; kick-in-list＆＃34;比如Array（＆＃39; class1＆＃39;，＆＃39; class2＆＃39;，＆＃39; class3＆＃39;）等，以便创建这些块。

非常感谢！

Answer 1

这是一个convert函数，可以按照您的指示组装数组。它将原始数组作为第一个参数，使用正则表达式将您的类与第二个参数匹配：

function convert($data, $pattern) {
    $result = array();
    foreach($data as $element) {
        if (array_key_exists("attr", $element) && 
                array_key_exists("class", $element["attr"]) && 
                preg_match($pattern, $element["attr"]["class"]) ) {
            $group = $element;
            // set the "type" key/value
            $group["type"] = $group["attr"]["class"];
            // remove the "class" key
            unset($group["attr"]["class"]);
            // remove the "attr" key, unless not empty
            if (sizeof($group["attr"]) == 0) {
                unset($group["attr"]);
            }
            // initialise "block" for collecting the next items
            $group["block"] = array();
            // add the group array to the result
            $result[] = $group;
        } else {
            if (!sizeof($result)) {
                // create a "pre" group if there was not yet a group:
                $result[] = array("type" => "pre", "content" => null, "block" => array());
            }
            // add to block
            $result[sizeof($result)-1]["block"][] = $element; 
        }
    }
    return $result;
}

// Set-up test data
$data = Array(
    Array('attr' => Array('class' => 'class1'), 'content'=>'class-1-content'),
    Array('attr' => Array(), 'content'=>'...'),
    Array('attr' => Array('class' => 'whatever'), 'content'=>'...'),
    Array('attr' => Array('class' => 'anything'), 'content'=>'...'),
    Array('attr' => Array(), 'content'=>'...'),
    Array('attr' => Array('class' => 'class2'), 'content'=>'class-2-content'),
    Array('attr' => Array('key' => 'more-here'), 'content'=>'...'),
    Array('attr' => Array('class' => 'class1'), 'content'=>'class-1-again'),
    Array('attr' => Array('another-attr' => ''), 'content'=>'...'),
    Array('attr' => Array(), 'content'=>'...'),
    Array('attr' => Array('class' => 'and-so-on'), 'content'=>'...')
);

// Call function on test data, grouping on class1 and class2
var_export (convert($data, "/^class[1-2]$/"));

上述脚本的输出是：

array (
    0 => array ('content' => 'class-1-content', 'type' => 'class1', 'block' => array (
        0 => array ('attr' => array (), 'content' => '...'),
        1 => array ('attr' => array ('class' => 'whatever'), 'content' => '...'),
        2 => array ('attr' => array ('class' => 'anything'), 'content' => '...'),
        3 => array ('attr' => array (), 'content' => '...'),
        ),
    ),
    1 => array ('content' => 'class-2-content', 'type' => 'class2', 'block' => array (
        0 => array ('attr' => array ('key' => 'more-here'), 'content' => '...'),
        ),
    ),
    2 => array ('content' => 'class-1-again', 'type' => 'class1', 'block' => array (
        0 => array ('attr' => array ('another-attr' => ''), 'content' => '...'),
        1 => array ('attr' => array (), 'content' => '...'),
        2 => array ('attr' => array ('class' => 'and-so-on'), 'content' => '...'),
    ),
  ),
)

...这是您指定的预期输出。

有一些完整性检查，以避免在attr密钥不仅仅包含组class属性时删除它。这不会出现在您的测试数据中，但最好是安全的。

此外，如果数据不是以要分组的元素开始（即示例中不是class1或class2的情况），则在结果中放入一个虚拟的“pre”组。将这些孤立数组分组。一个例子：

$data = Array(
    Array('attr' => Array(), 'content'=>'...'),
    Array('attr' => Array('class' => 'whatever'), 'content'=>'...'), 
    Array('attr' => Array('class' => 'anything'), 'content'=>'...'), 
    Array('attr' => Array(), 'content'=>'...'),
    Array('attr' => Array('class' => 'class1'), 'content'=>'class-1-content'),
    Array('attr' => Array(), 'content'=>'...')
);

将导致此输出：

array (
    0 => array ('type' => 'pre', 'content' => NULL, 'block' => array (
        0 => array ('attr' => array (), 'content' => '...'),
        1 => array ('attr' => array ('class' => 'whatever'), 'content' => '...'),
        2 => array ('attr' => array ('class' => 'anything'), 'content' => '...'),
        3 => array ('attr' => array (), 'content' => '...')
        ),
    ),
    1 => array ('content' => 'class-1-content', 'type' => 'class1', 'block' => array (
        0 => array ('attr' => array (), 'content' => '...'),
        ),
    ),
)

Answer 2

这可以使用当前阵列上的foreach()来完成。然后，如果设置了['attr']['class']值，我们会使用strpos()检查它是否以class开头。如果strpos() === 0我们将它添加为新的顶部数组元素，如果不是，我们使用简单的计数器var将它作为新的子数组元素添加到最后一个顶部数组元素，即。 $i。

$arrays = Array(
  Array('attr' => Array('class' => 'class1'), 'content'=>'class-1-content'),
  Array('attr' => Array(), 'content'=>'...'),
  Array('attr' => Array('class' => 'whatever'), 'content'=>'...'),
  Array('attr' => Array('class' => 'anything'), 'content'=>'...'),
  Array('attr' => Array(), 'content'=>'...'),
  Array('attr' => Array('class' => 'class2'), 'content'=>'...'),
  Array('attr' => Array('key' => 'more-here'), 'content'=>'...'),
  Array('attr' => Array('class' => 'class1'), 'content'=>'class-1-again'),
  Array('attr' => Array('another-attr' => ''), 'content'=>'...'),
  Array('attr' => Array(), 'content'=>'...'),
  Array('attr' => Array('class' => 'and-so-on'), 'content'=>'...')
  );

$i=-1; // simple counter
$newArray=array();
foreach($arrays as $array){
  if (isset($array['attr']['class']) && (0 === strpos($array['attr']['class'], 'class'))) {
      $i++; // increase the counter
      $newArray[]=$array; // add a new array element
    }
  else {
      $newArray[$i]['block'][]=$array; // add a new sub array element
    }
}

此处的示例 - https://3v4l.org/U1V8n

要阻止列表的数组

2 个答案: