2011-06-16 119 views
0

我是新的PHP。作爲一名實習生,我必須使用XML文件中的數據在MySQL中填充數據庫。問題是這些XML文件並不總是具有相同的格式。所以,我在php5中編寫了一個代碼,我想知道如何計算特定小孩在標籤中出現的次數。在我的XML文件中,我想要統計節點「ing-div」中出現子節點「ing」的次數。一些XML文件可以有一個,兩個或多個「ing-div」節點。任何幫助?如何計算標籤內兒童的出現次數?

這裏是XML文件

<?xml version="1.0" encoding="UTF-8" ?> 
- <recipeml version="0.5"> 
- <recipe> 
- <head> 
    <title>100 Whole Wheat Bread for Bread Machine</title> 
- <categories> 
    <cat>Breadmaker</cat> 
    <cat>Breads</cat> 
    </categories> 
    <yield>8</yield> 
    </head> 
- <ingredients> 
- <ing-div> 
    <title>REGULAR LOAF</title> 
- <ing> 
- <amt> 
    <qty>1</qty> 
    <unit>cup</unit> 
    </amt> 
    <item>Water</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>2 1/2</qty> 
    <unit>cups</unit> 
    </amt> 
    <item>Wheat bread flour</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>1 1/4</qty> 
    <unit>tablespoons</unit> 
    </amt> 
    <item>Dry milk</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>1</qty> 
    <unit>teaspoon</unit> 
    </amt> 
    <item>Salt</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>1 1/2</qty> 
    <unit>tablespoons</unit> 
    </amt> 
    <item>Butter</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>1 1/4</qty> 
    <unit>tablespoons</unit> 
    </amt> 
    <item>Honey</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>1</qty> 
    <unit>tablespoon</unit> 
    </amt> 
    <item>Gluten</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>2</qty> 
    <unit>teaspoons</unit> 
    </amt> 
    <item>Molasses</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>1 1/2</qty> 
    <unit>teaspoons</unit> 
    </amt> 
    <item>Fast-Rise yeast *** OR ***</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>2</qty> 
    <unit>teaspoons</unit> 
    </amt> 
    <item>Active-Dry yeast</item> 
    </ing> 
    </ing-div> 
- <ing-div> 
    <title>LARGE LOAF</title> 
- <ing> 
- <amt> 
    <qty>1 1/2</qty> 
    <unit>cups</unit> 
    </amt> 
    <item>+ 2 tb Water</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>3 3/4</qty> 
    <unit>cups</unit> 
    </amt> 
    <item>Wheat bread flour</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>2</qty> 
    <unit>tablespoons</unit> 
    </amt> 
    <item>Dry milk</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>1 1/2</qty> 
    <unit>teaspoons</unit> 
    </amt> 
    <item>Salt</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>2</qty> 
    <unit>tablespoons</unit> 
    </amt> 
    <item>Butter</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>2</qty> 
    <unit>tablespoons</unit> 
    </amt> 
    <item>Honey</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>1 1/2</qty> 
    <unit>tablespoons</unit> 
    </amt> 
    <item>Gluten</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>1</qty> 
    <unit>tablespoon</unit> 
    </amt> 
    <item>Molasses</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>2 1/8</qty> 
    <unit>teaspoons</unit> 
    </amt> 
    <item>Fast-Rise yeast *** OR ***</item> 
    </ing> 
- <ing> 
- <amt> 
    <qty>3</qty> 
    <unit>teaspoons</unit> 
    </amt> 
    <item>Active-Dry yeast</item> 
    </ing> 
    </ing-div> 
    </ingredients> 
- <directions> 
    <step>The trick to making 100% whole wheat bread in your machine is an extra knead, which gives the yeast and gluten a second chance to create a lighter loaf. When your first knead cycle is completed, simply reset the machine and start again. Some manufacturers produce home bakeries with a whole wheat cycle; if your machine doesn't have one, this start- again method works as an easy alternative. SUCCESS HINTS: The gluten gives the whole wheat flour the structure necessary for a good loaf. If your market doesn't stock wheat gluten, try your local health food store. Remember the extra knead. It's especially important in 100% whole wheat bread. Because of the extra knead, us this recipe only on the regular bake cycle. CALORIES: 125 PROTEIN: 14% CHOLESTEROL: 3.98mg CARBOHYDRATES: 73% SODIUM: 218mg FAT: 13% Posted to Bakery-Shoppe Digest V1 #410 by [email protected] (Serge Cyr) on Nov 23, 1997</step> 
    </directions> 
    </recipe> 
    </recipeml> 

而這正是我試圖「荷蘭國際集團-DIV」

$xml = simplexml_load_file($file); 
$ing_elem = new SimpleXMLElement($xml); 
printf("%d ing.\n", $ing_elem->{'ing-div'}->count()); 

內計數「ing」的的出現次數的數量的部分代碼但它根本不起作用。我有錯誤消息:用C未捕獲的異常「異常」與消息「字符串不能被解析爲XML」::

致命錯誤\瓦帕\ WWW \ PHP \文件夾XML \ New_Load_All_Files_1.php上線115

anny建議?

非常感謝你的時間和你的幫助。

T3000

+1

您確定您正在加載xml嗎?您收到的錯誤意味着簡單的XML無法讀取/解析xml文件。正如它寫的那樣,它期望'$ file'成爲xml文件的有效文件路徑。你確定它是正確的嗎?如果是這樣,你確定xml是有效的嗎? – bejonbee 2011-06-16 21:34:43

回答

0
$xml = new DOMDocument(); 
$xml->load(path/to/file); 
$xpath = new DOMXPath($xml); 
$ingdiv = $xpath->query("/recipeml/recipe/ingredients/ing-div"); 
$length = $ingdiv->length; 
// iterate over all <ing-div> from last to first 
while($length--) 
{ 
    // number of <ing> in the specific <ing-div> 
    print $xpath->query("ing", $ingdiv->item($length))->length; 
} 

編輯:

你不應該複製粘貼&從瀏覽器格式化輸出。

<?xml version="1.0" encoding="UTF-8" ?> 
- <recipeml/> 

這是格式錯誤的XML。 XML不能在根節點之外具有文本。

0

我不認爲你需要下面一行:

$ing_elem = new SimpleXMLElement($xml); 

,因爲使用的是使用simplexml_load_file($文件)創建一個SimpleXMLElement對象

所以你的SimpleXML對象只能用這個來創建行:

$ing_elem = simplexml_load_file($file); 

您可以使用下面的代碼片段,以獲取有關錯誤的信息,這可能會發生:

libxml_use_internal_errors(true); 
$ing_elem = simplexml_load_file($file); 
if (!$ing_elem) { 
    echo "Failed loading XML\n"; 
    foreach(libxml_get_errors() as $error) { 
     echo "\t", $error->message; 
    } 
} 
+0

但是如果idelete行$ ing_elem = new SimpleXMLElement($ xml);我會遇到以下問題,因爲我的變量$ ing_elem將不再被定義。 – T3000 2011-06-16 21:45:38