php - PHP 多维数组分割

Question

我有多维数组

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

然后我爆炸了$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:

我怎样才能得到这样的结果

5 有权访问添加
4 拥有编辑权限
6 有权添加、编辑
19 有权添加、删除、查看

Answer 1

我认为在这种情况下，正则表达式会是更好的解决方案，以防您没有考虑使用它。

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

使用正则表达式可以简化代码，并且可以更轻松地更改支持的输入格式。

$result 数组最终得到一个 HashMap ，使用您的数字 ID 作为键，使用权限数组(添加、删除等)作为每个键的值。