PHP簡單的HTML DOM解析器 - 如何從div類獲得價格

Question

我想從website得到<div class="field-item even">的價格，但只能得到一個白色屏幕，似乎無法理解爲什麼它會失敗。

下面是我的代碼，試圖做到這一點：

<?php 
    header("Content-types: text/html; charset=utf8"); 
    include('simple_html_dom.php'); 
    $html = file_get_html('https://raceskis.ski-depot.com/products/skis'); 

    $price['ski'] = $html->find('.field-item even'); 

    echo $price['ski']; 
    print_r($price); 

我怎樣才能成功地做到這一點？

Answer 1

您可以輕鬆實現使用DomDocument解析HTML並使用xpath查詢訪問所需的數據。

在這裏你有一個基本的例子，從類'領域項目甚至'從div獲取數據。

<?php 

$html = file_get_contents("https://raceskis.ski-depot.com/products/skis"); 

$doc = new DOMDocument(); 
$doc->loadHTML($html); 

$xpath = new DomXPath($doc); 

$nodeList = $xpath->query("//div[@class='field-item even']"); 

print_r($nodeList); 

foreach($nodeList as $node){ 
    echo "<p>" . $node->nodeValue . "</p>"; 
} 

輸出是：

 
DOMNodeList Object 
(
    [length] => 97 
) 
1
0
Fischer RC4 Superior RC w/bindings Skis 2014
In stock
$900.00
$399.00
1
0
Fischer Worldcup SC w/bindings Race Skis 2015
In stock
$1,250.00
$499.00
1
0
 

現在你可以過濾這些信息只拿到了價格。

$pricesArray = []; 

foreach($nodeList as $node){ 

    $nodeValue = $node->nodeValue; 

    // If $nodeValue has content and its first character is $ 
    if($nodeValue && $nodeValue[0] == '$'){ 
    $pricesArray[] = $nodeValue; 
    } 
} 

echo "<pre>"; 
print_r($pricesArray); 
echo "</pre>"; 

輸出是：

Array 
(
    [0] => $900.00 
    [1] => $399.00 
    [2] => $1,250.00 
    [3] => $499.00 
    [4] => $550.00 
    [5] => $275.00 
    [6] => $900.00 
    [7] => $375.00 
    [8] => $1,200.00 
    [9] => $599.00 
    [10] => $1,065.00 
    [11] => $499.00 
    [12] => $550.00 
    [13] => $275.00 
    [14] => $1,125.00 
    [15] => $549.00 
    [16] => $1,125.00 
    [17] => $549.00 
    [18] => $1,250.00 
    [19] => $549.00 
    [20] => $550.00 
    [21] => $275.00 
    [22] => $1,065.00 
    [23] => $599.00 
)