訪問和更新序列化數組內的數據的問題

Question

我希望有人能夠幫助我或指出我朝着正確的方向。我花了一個星期的時間試圖弄清楚如何訪問和更新WP電子商務中的權重字段，並且Ive沒有成功訪問它並更新新的值。

我正在使用的腳本訪問一個網站來刮取漫畫書信息。然後，它解析xml文件中的數據，併爲第二個變量分配WP電子商務特有的值。

整個腳本運行得非常漂亮，爲每本漫畫書創建產品頁面，並將所有數據添加到每個產品中。除了一個！而且我一直堅持了一個星期，試圖找出如何訪問元和更新它。這是用於weight和weight_unit的_wpsc_product_metadata數組以及存儲在其中的其他元值。

漫畫的重量大約爲3盎司，我一直試圖將這個值分配給每張卡片，因爲它創建了「3」和「盎司」 - 我一直沒有成功。

我試過了很多不同的方式，從挖掘到電子商務代碼到在網上查找，閱讀有關多維數組，序列化數組，並且它沒有單擊我的noggin'。請記住，在過去的一個月中，我只使用PHP進行編程，在一個月之前，除了15年前涉足C和C++之外，我對代碼一無所知。那時候，它主要是複製現有的代碼和改變MUDS（多用戶地下城）的輸出 - 當在線遊戲是基於文本的時候，大聲笑。

我認爲我可以通過使用訪問WP電子商務元：

get_post_meta($post_id, '_wpsc_product_metadata', true); That did not work. 

實現這一點的其他方法我試過：

get_post_meta(get_the_id($post_id), '_wpsc_product_metadata', true); // no success 

我嘗試使用它像這樣特定產品ID：

get_the_id(300), or just '300', i've used single quotes double quotes no qoutes, "{}", etc etc etc etc 

現在，當我已經使用：

個

get_post_meta($post_id, ''); //while in the loop 

的SKU和價格的值輸出但是不知道內_wpsc_product_metadata

是後來，當我使用這個：

$product_data['meta'] = array(); 
$product_data['meta'] = maybe_unserialize(get_post_meta('$post_id', '')); 

這是我所得到的，當我的print_r

Array ([_wpsc_price] => Array ([0] => Array ([0] => 19.99)) 
[_wpsc_sku] => Array ([0] => Array ([0] => 978-0-7851-5209-5))) 

所以我嘗試了一件事，我去了一個特定的產品，我手動設置重量爲5，我改變了代碼如下：

$product_data['meta'] = array(); 
$product_data['meta'] = maybe_unserialize(get_post_meta('44317', '')); 

這是輸出：

Array ([_wpsc_stock] => Array ([0] => Array ([0] =>)) 
[_wpsc_product_metadata] => Array ([0] => Array ([0] => 
a:19:{s:25:"wpec_taxes_taxable_amount";s:0:"";s:13:"external_link";s:0: 
"";s:18:"external_link_text";s:0:"";s:20:"external_link_target";s:0:"";s:6: 
"weight";s:3:"0.3";s:11:"weight_unit";s:5:"pound";s:10:"dimensions";a:6: 
{s:6:"height";s:1:"0";s:11:"height_unit";s:2:"in";s:5:"width";s:2:"0 
";s:10:"width_unit";s:2:"in";s:6:"length";s:1:"0";s:11:"length_unit"; 
s:2:"in";}s:8:"shipping";a:{s:5:"local";s:1:"0";s:13:"international";s:1:"0";} 
s:14:"merchant_notes";s:0:"";s:8:"engraved";s:1:"0";s:23: 
"can_have_uploaded_image";s:1:"0";s:15:"enable_comments";s:0:""; 
s:24:"unpublish_when_none_left";s:1:"0";s:11:"no_shipping";s:1:"0";s:16: 
"quantity_limited";s:1:"0";s:7:"special";s:1:"0";s:17:"display_weight_as";s:5: 
"pound";s:16:"table_rate_price";a:2:{s:8:"quantity";a:0:{}s:11:"table_price";a:0: 
{}}s:17:"google_prohibited";s:1:"0";})) [_wpsc_special_price] => Array ([0] => 
Array ([0] => 0)) [_edit_last] => Array ([0] => Array ([0] => 1)) 
[_edit_lock] => Array ([0] => Array ([0] => 1333358836:1)) [_wpsc_sku] => 
Array ([0] => Array ([0] => 978-0-7851-6421-0)) [_wpsc_price] => Array 
([0] => Array ([0] => 24.99)) [_wpsc_is_donation] => Array ([0] => Array ( 
[0] => 0)) [_wpsc_currency] => Array ([0] => Array ([0] => a:0:{}))) 

我希望，沒有我求有人也許能開導我，並告訴我如何訪問和更新存儲在該數據_wpsc_product_metadata特別是weight和weight_unit，如果你知道怎麼做會更好，你可以給我看一個例子，將新創建的帖子權重更新爲一個值，並將默認weight_unit從磅改爲盎司。

這裏是參考代碼：

<?php 
    function scraping_comic() 
    { 
     $html = file_get_html('http://site-to-strip.com/'); 
     $matches = str_replace (' ', ' ', $article); 

     foreach($html->find('li.browse_result') as $article) 
     { 
      // get comic title 
      $item['title'] = trim($article->find('h4', 0)->find('span',0)->outertext); 
      // get comic title url 
      $item['title_url'] = trim($article->find('h4', 0)->find('a.grid-hidden',0)->href); 
      // get comic image 
      $item['image_url'] = trim($article->find('img.main_thumb',0)->src); 
      // get comic excerpt 
      $item['excerpt'] = trim($article->find('p.browse_result_description_release', 0)->plaintext); 
      // get comic sales info 
      $item['on_sale'] = trim($article->find('.browse_comics_release_dates', 0)->plaintext); 
      // strip numbers and punctuations 
      $item['title2'] = trim(preg_replace("/[^A-Za-z-\t\n\s]/","",$article->find('h4',0)->find('span',0)->plaintext)); 
      $item['title3'] = trim(preg_replace("/[^A-Za-z]/","",$article->find('h4',0)->find('span',0)->plaintext)); 
      $ret[] = $item; 
     } 
     $html->clear(); 
     unset($html); 
     return $ret; 
    } 

    $ret = scraping_comic(); 
    if (! empty($ret)) 
    { 
     foreach($ret as $v) 
     { 
      //download the image 
      $url = $v['image_url']; 
      $title = $v['title3']; 
      $now = time(); 
      $num = date("w"); 
      if ($num == 0) 
      { $sub = 6; } 
      else { $sub = ($num-1); } 
      $WeekMon = mktime(0, 0, 0, date("m", $now) , date("d", $now)-$sub, date("Y", $now)); 
      $todayh = getdate($WeekMon); 
      $d = $todayh[mday]; 
      $m = $todayh[mon]; 
      $y = $todayh[year]; 
      $date_stamp = $d.$m.$y; 

      //scrape inside pages 
      $scrape = 'http://domain.com'; 
      $comic_details = $v['title_url']; 
      $comic_details_url = $scrape.$comic_details; 
      $url2 = file_get_html($comic_details_url); 

      foreach($url2->find('.comics_detail_lead_left_panel_content') as $the_details); 
      $matches = str_replace (' ', ' ', $the_details); 
      { 
       $item2['image2_url'] = trim($the_details->find('img.frame-img',0)->src); 
       $item2['full_desc'] = trim($the_details->find('p',0)->plaintext); 
       $item2['data'] = trim($the_details->find('dl',0)->plaintext); 
      } 

      $url2->clear(); 
      unset($url2);       

      //download medium-sized image 
      $root2 = ('/home/****/public_html/wp-content/blogs.dir/14/files/comics/' .$title.$date_stamp. '-medium.jpg'); 
      $image2 = $item2['image2_url']; 
      copy($image2, $root2); 

      unset($root2); 
      unset($image2); 

      //match specific data and assign variables 
      $string = $item2['data']; 
      $number = preg_match("/(Comic|Hardcover|Paperback)[^A-Za-z]+/", $string, $fields); 
      switch ($fields[1]) 
      { 
       case ('Comic'): 
        $cat = array(51, 52); 
        break; 
       case ('Hardcover'): 
        $cat = array(85, 52); 
        break; 
       case ('Paperback'): 
        $cat = array(95, 52); 
        break; 
       default: ""; 
      } 

      $number = preg_match("/((January)|(February)|(March)|(April)|(May)|(June)|(July)|(August)|(September)|(October)|(November)|(December))[^A-Za-z0-9,]+[A-Za-z0-9,\s]+/", $string, $fields); 
      $date = $fields[0]; 
      $number = preg_match("/((UPC)|(ISBN))[^0-9-]+([0-9-]+)/", $string, $fields); 
      $upc = $fields[4]; 
      $number = preg_match("/((Price))[^0-9.]+([0-9.\s]+)/", $string, $fields); 
      $price = $fields[3]; 

      $full_desc = $item2['full_desc']; 
      $maintitle = $v['title']; 
      $excerpt = $v['excerpt']; 

      $comic_post = array(); 
      $comic_post['post_title'] = wp_strip_all_tags($maintitle); 

      $comic_post['post_content'] = wp_strip_all_tags($full_desc); 
      $comic_post['post_status'] = 'publish'; 
      $comic_post['post_author'] = 1; 
      $comic_post['post_type'] = 'wpsc-product'; 
      $comic_post['post_category'] = $cat; 
      $comic_post['comment_status'] = 'closed'; 
      $comic_post['ping_status'] = 'closed'; 
      $comic_post['post_excerpt'] = wp_strip_all_tags($excerpt);  

      // create comic book 
      $post_id = wp_insert_post($comic_post); 
      // category insertion does not work fixed this by calling wp_set_post_terms 
      wp_set_post_terms($post_id, $cat, 'wpsc_product_category'); 

      $wpsc_custom = update_post_meta; 
      $wpsc_custom($post_id, '_wpsc_price', $price); 
      $wpsc_custom($post_id, '_wpsc_sku', $upc); 

      //Gain access to WP Ecommerce meta data and assign new values to weight ***IN PROGRESS*** 
      $product_data['meta'] = array(); 
      $product_data['meta'] = maybe_unserialize(get_post_meta($post_id, '')); 

      //***TESTING***// 
      echo '<br /> the data <br />'; 
      print_r($product_data['meta']); 

      //Set featured image for product 
      $filename = ('comics/' .$title .$date_stamp. '-medium.jpg'); 
      update_post_meta($post_ID, 'image_thumbnail', $imgloc); 
      set_featured_image($post_id, $filename); 
     } 
    } 
    else { echo 'Could not scrape site!'; } 
?> 

Answer 1

在WP電子商務貢獻者的幫助下，這裏是缺少更新體重的難題。

if(!isset($product_data['meta']) || !is_array($product_data['meta'])) { 
    $product_data['meta'] = array(); 
} 

if(!isset($product_data['meta']['_wpsc_product_metadata'])) { 
    $product_data['meta']['_wpsc_product_metadata'] = 
maybe_unserialize(get_post_meta($post_id, '_wpsc_product_metadata', true)); 
} 

if(!is_array($product_data['meta']['_wpsc_product_metadata'])) { 
    $product_data['meta']['_wpsc_product_metadata'] = array(); 
} 

$product_data['meta']['_wpsc_product_metadata']['weight_unit'] = 'ounce'; 
$product_data['meta']['_wpsc_product_metadata']['weight'] = 0.19; 

update_post_meta($post_id, '_wpsc_product_metadata', $product_data['meta']['_wpsc_product_metadata']); 

Answer 2

對未編程這麼久，最近纔看着PHP你似乎做得不錯的人。

關於數組。 _wpsc_product_metadata看起來是JSON。您應該看看PHP手冊，特別是與JSON相關的部分，鏈接如下。

http://php.net/manual/en/book.json.php

如果使用json_decode你將能夠檢索具有您需要爲對象的屬性的屬性的對象。