PHP - 访问多维数组的数据

  • Z时代
  • 2024-01-10
  • 分类：问答

我想访问多维数组中的数据。 我需要获取这些数据的值(EC000001, EG000017, EN, EF007220)，但我在PHP中处于foreach循环的困境，特别是当需要嵌套的foreach时能否请你帮助我，给我解决方案来访问想要的数据？PHP - 访问多维数组的数据

我需要遍历所有的$ c，然后循环内部以获取所有需要的数据。这是我之前收集EC000001值的方法，但我相信有更好的解决方案。阵列的

foreach ($c as $classCodes => $value) { 
    $classCode = key($c[$classCodes]); //classCode -> EC000001 
}

结构：

Array 
(
    **[EC000001]** => Array 
     (
      [0] => **EG000017** 
      [1] => Array 
       (
        [0] => Array 
         (
          [0] => **EN** 
          [1] => Busbar terminal 
         ) 
        [1] => Array 
         (
          [0] => **nl-NL** 
          [1] => Aansluitklem stroomrail 
         ) 
       ) 
      [2] => Array 
       (
        [0] => Array 
         (
          [0] => **EF007220** 
          [1] => EU570448 
          [2] => Array 
           (
           ) 
         ) 
        [1] => Array 
         (
          [0] => EF007219 
          [1] => EU570448 
          [2] => Array 
           (
           ) 
         ) 
        [2] => Array 
         (
          [0] => EF000073 
          [1] => 
          [2] => Array 
           (
            [0] => EV009241 
            [1] => EV009472 
           ) 
         ) 
        [3] => Array 
         (
          [0] => EF007092 
          [1] => EU570448 
         ) 
        [4] => Array 
         (
          [0] => EF004969 
          [1] => EU570126  
         ) 
       ) 
     ) 
)

回答：

我无法测试它，但你可以用这个尝试的循环中：

$value[0];  // -> 1 
$value[1][0][0]; // -> 2 
$value[1][1][1]; // -> 3

回答：

$EG000002Array[0][EG000001][0] 
$EG000002Array[0][EG000001][1][0] 
$EG000002Array[0][EG000001][1][1][1]

回答：

有多种途径获得来自多维阵列的阵列值

例如使用的foreach（）：

$flavors = array('Japanese' => array('hot' => 'wasabi', 
            'salty' => 'soy sauce'), 
       'Chinese' => array('hot' => 'mustard', 
            'pepper-salty' => 'prickly ash')); 
// $culture is the key and $culture_flavors is the value (an array) 
foreach ($flavors as $culture => $culture_flavors) { 
    // $flavor is the key and $example is the value 
    foreach ($culture_flavors as $flavor => $example) { 
     print "A $culture $flavor flavor is $example.\n"; 
    } 
}

或使用用于（）：

$specials = array(array('Chestnut Bun', 'Walnut Bun', 'Peanut Bun'), 
        array('Chestnut Salad','Walnut Salad', 'Peanut Salad')); 
// $num_specials is 2: the number of elements in the first dimension of $specials 
for ($i = 0, $num_specials = count($specials); $i < $num_specials; $i++) { 
    // $num_sub is 3: the number of elements in each sub-array 
    for ($m = 0, $num_sub = count($specials[$i]); $m < $num_sub; $m++) { 
     print "Element [$i][$m] is " . $specials[$i][$m] . "\n"; 
    } 
}

输出应该是这样的：

Element [0][0] is Chestnut Bun 
Element [0][1] is Walnut Bun 
Element [0][2] is Peanut Bun 
Element [1][0] is Chestnut Salad 
Element [1][1] is Walnut Salad 
Element [1][2] is Peanut Salad

回答：

可以使用递归和正则表达式检查它是否粗体:)

通知我们把&到$classCodes通过参考通过它和值没有 。

功能：

function get_bolded_data($c, &$classCodes = array()){ 
    foreach($c as $k1 => $v1){ 
     if(is_array($v1)){ 
      //If $v1 is an array we call get_bolded_data() again and pass 
      //$v1 and $classCode 
      get_bolded_data($v1,$classCodes); 
     }else if(preg_match("/(\*\*).*(\*\*)/", $v1)){ 
      $classCodes[] = $v1; 
     } 
    } 
}

用法：

$classCodes = array(); 
$c = array(
    0 => array(
     '**EC000001**' => array(
      0 => '**EG000017**', 
      1 => array(
       0 => array(
        0 => '**EN**', 
        1 => 'Busbar terminal' 
       ) , 
       1 => array(
        0 => '**nl-NL**', 
        1 => 'Aansluitklem stroomrail' 
       ) 
      ) , 
      2 => array(
       0 => array(
        0 => '**EF007220**', 
        1 => 'EU570448', 
        2 => array() 
       ) , 
       1 => array(
        0 => 'EF007219', 
        1 => 'EU570448', 
        2 => array() 
       ) , 
       2 => array(
        0 => 'EF000073', 
        1 => '', 
        2 => array(
         0 => 'EV009241', 
         1 => 'EV009472' 
        ) 
       ) , 
       3 => array(
        0 => 'EF007092', 
        1 => 'EU570448' 
       ) , 
       4 => array(
        0 => 'EF004969', 
        1 => 'EU570126' 
       ) 
      ) 
     ) 
    ) 
); 
//Call our function 
get_bolded_data($c, $classCodes);

下面是从的var_dump结果：

array(4) { 
    [0]=> 
    string(12) "**EG000017**" 
    [1]=> 
    string(6) "**EN**" 
    [2]=> 
    string(9) "**nl-NL**" 
    [3]=> 
    string(12) "**EF007220**" 
}

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