将具有三个分隔符的字符串解析为索引数组的关联数组

Question

我有这行字符串

Fruits-banana|apple|orange:Food-fries|sausages:Desserts-ice Cream|apple pie

: （冒号）是分隔符主主题，| 是不同类型子主题的分隔符。

我尝试将其分解并放入数组中，我需要将结果显示在下拉菜单中：-

Fruits
  banana
  apple
  orange
Food
  fries 
  sausages
...

代码：

$result = explode(":", $data);
foreach ($result as $res) {
    $sub_res[] = explode("-", $res);
}

foreach ($sub_res as $sub) {
    //echo $sub[1] . "<br>";

    \*
       Over here, I can get the strings of 
       [0] => banana|apple|orange,
       [1] => sausages|fries,
    */
    // I explode it again to get each items 
    $items[] = explode("|", $sub[1]);
    $mainCategory[] = $sub[0]; // This is ([0]=>Fruits, ]1]=>Food, [2]=>dessert
    // How do I assign the $items into respective categories?
}

Answer 1

您可以执行以下操作：

$result = explode(":", $data);
foreach ($result as $res) {
    $sub = explode("-", $res);
    $mainCategory[$sub[0]] = explode("|", $sub[1]);
}

工作链接

Answer 2

代码：

$data = "Fruits-banana|apple|orange:Food-fries|sausages:Desserts-ice cream|apple pie";
 foreach(explode(":",$data) as $res) { // explode by ":"
  $cat = explode("-",$res); // explode by "-"
  $ilovefood[$cat[0]] = explode("|",$cat[1]); // explode by "|"
 }
 print_r($ilovefood);
 //Returns : Array ( [Fruits] => Array ( [0] => banana [1] => apple [2] => orange ) [Food] => Array ( [0] => fries [1] => sausages ) [Desserts] => Array ( [0] => ice cream [1] => apple pie ) )
 foreach($ilovefood as $type=>$yum){
  echo "$type:<select>";
  foreach($yum as $tasty){
   echo "<option>$tasty</option>";
  }
  echo "</select>";
 }

更新以反映下拉列表的添加。看起来我刚刚做了你的作业，不过我将让你将所有内容合并到一个 foreach 循环中。

Answer 3

我建议 Codeaddicts 的 答案

$str = "Fruits-banana|apple|orange:Food-fries|sausages:Desserts-ice cream|apple pie";

$topics = array();
foreach (explode(':', $str) as $topic) {
  list($name, $items) = explode('-', $topic);
  $topics[$name] = explode('|', $items);
}