如何輸出多維數組？

Question

我是新的多維數組在PHP中，我讀這SO answer，我試圖創建我的二維數組，但我怎麼輸出它？

$nPost = array("orange, table"); 
$count_values = array("fruit, forniture"); 
$final_array = array(array($count_values), array($nPost)); 

輸出將必須是：

Fruits: orange, Forniture: table 

試過

print_r($final_array);

，但我得到

Array ([0] => Array ([0] => Array ([0] => fruit, forniture)) [1] => Array ([0] => Array ([0] => orange, table))) 
0 fruit, forniture 

UPDATE

現實生活的完整代碼（代碼中的註釋說明）：

<?php 
         $stack = array(); 
$userID = array(); 
$nPost = array(); 


$blogusers = get_users('orderby=nicename&role=author'); 

foreach ($blogusers as $user) { 

    // get the language list for each user, and push to array 

    $descTokens = explode(',', $user->user_description); 
    $stack = array_merge($stack, $descTokens); 

    // get the ID for each user, and push to the array 
    // get the number of posts for each user ID and push to array 

    $the_user_id = $user->ID; 
    $numPosts = count_user_posts($the_user_id); 
    array_push($userID, $the_user_id); 
    array_push($nPost, $numPosts); 
} 

    // get the count for each language by counting the duplicate strings 

$count_values = array(); 
foreach ($stack as $a) { 
    @$count_values[$a]++; 
} 
$total_duplicates = 0; 
foreach ($count_values as $a) { 
    if($count_values[$a]<=1){ 
     unset($count_values[$a]); 
    } else{ 
     $total_duplicates += $count_values[$a]; 
    } 
    } 

for($i = 0; $i < count($count_values); $i++){ 
    $final_array[$count_values[$i]] = $nPost[$i]; 
} 

foreach($final_array as $label => $item){ 
    echo "$label: $item, "; 
} 
    ?> 
      // This gives me a correct result but not the n. posts 
    <ul> 
     <?php 
      foreach ($count_values as $key=>$count) { 
       echo '<li>'.$key.' '.$count.'</li>'; 
      } 
     ?> 
    </ul> 

我們努力實現的是：

• 1法語用2個帖子
• 3英語用5個帖子

Answer 1

<?php 

class User { 

    public $id; 
    public $numPosts; 
    public $languages = array(); 

    public function __construct($id, $numPosts, $lang = array()){ 
     $this->id = $id; 
     $this->numPosts = $numPosts; 
     $this->languages = $lang; 
    } 
} 

$users = array(); 

$john = new User(1, 4, array("English", "French")); 
$fred = new User(2, 3, array("English")); 
$dave = new User(3, 7, array("German", "French", "Spanish")); 

$users[] = $john; 
$users[] = $fred; 
$users[] = $dave; 

$langPostCount = array(); 
$langUserCount = array(); 

foreach($users as $user){ 
    foreach($user->languages as $lang){ 
     $langUserCount[$lang] += 1; // this is what you already have from $count_values 
     //$langPostCount[$lang] += $user->numPosts; // can be done here but we'll do another loop 
    } 
} 

/* 
* the following can be done in the above loop, but you already have that functionality in your code 
* just need to do another loop through your languages, tallying the number of posts in that language 
* keep in mind this is not entirely accurate as your users have multiple languages. they might have 
* one post in english and 4 in french. A better way to do this would be to select the number of posts 
* in each language directly from the posts database. 
*/ 

foreach($langUserCount as $lang => $userCount){ 
    foreach($users as $user){ 
     if(in_array($lang, $user->languages)){ 
      $langPostCount[$lang] += $user->numPosts; 
     } 
    } 
} 

echo "<ul>"; 
foreach($langUserCount as $lang => $userCount){ 
    echo "<li>$userCount $lang with " . $langPostCount[$lang] . " posts.</li>"; 
} 
echo "</ul>"; 

?> 

OUTPUT

• 2英7個職位。
• 2個法文，共有11個帖子。
• 1個德語，7個帖子。
• 1西班牙語，7帖子。

正如你所看到的，並不完全準確。通過查詢你的帖子數據集，你最好通過自下而上的方式來獲取帖子數。

嘗試這個

在頂部添加新的理貨foreach循環，並在年底改變了UL循環。

$postsPerLanguage = array(); // add this 

foreach ($blogusers as $user) { 

    $descTokens = explode(',', $user->user_description); 
    ... 
    $numPosts = count_user_posts($the_user_id); 
    ... 
    // add this loop 
    foreach($descTokens as $lang){ 
     $postsPerLanguage[$lang] += $numPosts; 
    } 
} 

... 

<ul> 
    <?php 
     foreach ($count_values as $key=>$count) { 
      echo '<li>'.$key.' '.$count.' with '. $postsPerLanguage[$key] .' posts</li>'; 
     } 
    ?> 
</ul> 

Answer 2

您的輸出不需要多維數組，你可以這樣實現它：

$final_array = array('Fruits'=> 'orange', 'Furniture'=> 'table') 

但例如，如果您有多個水果或傢俱，你可以做這樣的事情：

$final_array = array('Fruits'=> array('orange', 'apple'), 'Furniture'=> array('table', 'sofa')) 

，你可以這樣訪問蘋果：

echo $final_array['Fruits'][1]; 

和print_r($final_array)，我們有這樣的：

[Fruits] => (
    [0] => orange, 
    [1] => apple 
) 
[Furniture] => (
    [0] => table, 
    [1] => sofa 
)