Question

我有多维数组

$a = "5,add|4,edit|6,add|6,edit|19,add|19,delete|19,view";

然后我爆炸$ a

$array_a = explode("|", $a);

//loop

for($i=0;$i<=count($arr_a)-1;$i++){

    arr_b = explode(",", $arr_a[$i]);

    foreach($arr_b as $id => $access){
        echo $id." have access ".$access;
    }
}

//result 
0 have access 5
1 have access add
0 have access 4
1 have access edit
0 have access 6
1 have access add
0 have access 6
1 have access edit
0 have access 19
1 have access add
0 have access 19
1 have access delete
0 have access 19
1 have access view
//-end result

问题是：

我怎么能像这样得到结果

5有访问权限添加
4有访问编辑
6有访问添加，编辑
19有访问添加，删除，查看

Answer 1

在这种情况下，我认为Regex会是一个更好的解决方案，如果您没有考虑使用它。

示例（已测试）：

$a = "5,add|4,edit|6,add|6,edit|19,add|19,delete|19,view";

$result = array();

// match each pair in the input
if (preg_match_all('/(\\d+)\\,(.*?)(\\||$)/m', $a, $matches)){

    foreach( $matches[1] as $match_index => $match ){

        $result[$match][] = $matches[2][$match_index];

    }

}

// loop through the results and print in desired format
foreach( $result as $entry_index => $entry ){
    echo "$entry_index have access " . implode( ',', $entry ) . "\n";
}

输出：

5 have access add
4 have access edit
6 have access add,edit
19 have access add,delete,view

使用正则表达式简化了代码，并且更容易更改支持的输入格式。

$ result数组以哈希映射结束，使用您的数字ID作为键和权限数组（添加，删除等）作为每个键的值。

Answer 2

试试这个（测试过）：

// intial data
$strAccess = "5,add|4,edit|6,add|6,edit|19,add|19,delete|19,view";

// build access array
$arrayAccess = array();

$tmpList = explode('|', $strAccess);

foreach($tmpList as $access)
{
  list($idUser, $right) = explode(',', $access);

  if (!isset($arrayAccess[$idUser]))
    $arrayAccess[$idUser] = array();

  $arrayAccess[$idUser][] = $right;
}

// print it out
foreach($arrayAccess as $idUser => $accessList)
  echo $idUser." has access ".implode(",", $accessList)."\n";

Answer 3

$a = "5,add|4,edit|6,add|6,edit|19,add|19,delete|19,view";
$array_a = explode("|". $a);

//loop
$aRights = array();
for($i=0;$i<=count($arr_a)-1;$i++){ $arr_b = explode(",", $arr_a[$i]);

     foreach($arr_b as $id => $access){
        $aRights[$id][] = $access;
     }
}

foreach( $aRights as $id=>$rightsList){
    echo $id." have access ";
    $i=1;
    foreach($rightsList as $r){

       echo $r;
       if($i != count($rightsList)) echo ",";
       $i++;
   }
}

Answer 4

您可以使用类似

的计数器

  $count5=0;
  foreach($arr_b as $id => $access){
    if($access=='5'){
    $count5++;
    }
  echo $id." have access ".$count5;
 }

Answer 5

像hashmapping这样的东西：

$tobegenerated = array();
$a = explode(yourdelimiter,yourstring);
foreach ($a as $cur)
{
    $b = explode(delimiter,$cur);
    $tobegenerated[$cur[0]] = $cur[1];
}
//Print hashmap $tobegenerated

这应该有用，请记住在php数组中也是哈希映射

编辑1： PHP中的数组是哈希映射。哈希映射可以解释为一个数组，其中键可以是任何东西，值也可以是任何值。在这种情况下，您希望使用哈希映射，因为您需要绑定“超出”数组范围的值（即使它们是整数）。因此，哈希映射正是您想要的，允许将任何内容指定为键。

hash map如何运作，您可以在谷歌或维基百科上搜索。如何在php中使用数组here

多维数组拆分与爆炸PHP

5 个答案: