獲取從數組父/子映射嵌套陣列陣列值

Question

可以說我有一個這樣的數組：

$a = array(
    "foo", 
    "bar" 
); 

和

$b = array(
    "foo" => array(
     "bar" => 1 
    ) 
); 

，我想用$a得到$b[$a[0]][$a[1]]

假設是1 .. *長度$a和1 .. *水平$b。

Answer 1

$result = $b; 
foreach ($a as $index) { 
    $result = $result[$index]; 
} 
echo $result; 

Answer 2

這應該爲你工作：

<?php 

    //As an example 
    $a = array(
     "foo", 
     "bar", 
     "xy", 
     "ab" 
    ); 

    $b = array(
     "foo" => array(
      "bar" => array(
       "xy" => array(
        "ab" => 14 
       ), 
      ), 
     ) 
    ); 

    $end = $b; 
    foreach ($a as $index) 
     $end = $end[$index]; 

    echo $end; 

?> 

輸出：

14