PHP的DOM HTML表操作

我想弄清楚为什么这段代码不工作。它从代码的另一部分获取HTML，将表从中取出，创建另一列并尝试将td元素移动到新创建列中的上一行。PHP的DOM HTML表操作

表输入：

+-------------------+-------------------+-------------------+ 
| Existing column1 | Existing column2 | Existing column3 | 
+-------------------+-------------------+-------------------+ 
| A     | B     | C     | 
| D     | E     | F     | 
| G               | 
+-------------------+-------------------+-------------------+

我想尝试，并使它看起来像这样：

+-------------------+-------------------+-------------------+-------------+ 
| Existing column1 | Existing column2 | Existing column3 | New column1 | 
+-------------------+-------------------+-------------------+-------------+ 
| A     | B     | C     |    | 
| D     | E     | F     | G   | 
+-------------------+-------------------+-------------------+-------------+

因此，只要td元素具有类text-info，它移动起来一个tr和附加到最后Comment列

我的代码到目前为止：

$dom = new DOMDocument();//Loads DOM document 
$dom->loadHTML($str);//Loads HTML from a previously set variable 
$xpath = new DOMXPath($dom); 
$tables = $xpath->query('//table[@class="behaviourtable table"]');//Get only table from HTML 
$commsTable = ''; 
foreach ($tables as $table) { 
    $commsTable .= $dom->saveXML($table); 
} 

$commsHTML = new DOMDocument(); 
$commsHTML->loadHTML($commsTable); 

$tr = $commsHTML->getElementsByTagName('tr'); 


$th = $commsHTML->createElement('th', 'Comment'); 
$tr->item(0)->appendChild($th); 

$xpathcomms = new DOMXPath($commsHTML); 
$comments = $xpathcomms->query('//td[@class="text-info"]'); 
if($comments->length > 0){ 
    echo "if running"; 
foreach($comments as $comment){ 
    $parent = $comment->parentNode; 
$parent->appendChild($comment); 
$commsHTML->saveXML($parent); 
} 

} 


echo $commsHTML->saveHTML();

来源

2016-10-12 Matthew Price

我觉得'$ tables'没有任何结果。由于类名不能包含空格，但是您使用了[[class =“behaviourtable table”]' – Mohammad

@Mohammad代码运行到'$ xpathcomms = new DOMXPath（$ commsHTML）;'行。 '$ tables'肯定会返回带有新列'Comments'的HTML表格。 –

php是否会返回任何错误？ – Mohammad

在你的代码追加td到原来的父节点（什么都不做），而你究竟想要做的就是获取父（tr），进入到它的前一个兄弟（上一页tr）和追加该td到tr：

foreach($comments as $comment){ 
    $parent = $comment->parentNode; 
    $parent->previousSibling->appendChild($comment); 
}

这是一个完整的工作示例：

$str = <<<END 
<table class="behaviourtable table"> 
    <tr> 
     <th>Existing column1</th> 
     <th>Existing column2</th> 
     <th>Existing column3</th> 
    </tr><tr> 
     <td>A</td> 
     <td>B</td> 
     <td>C</td> 
    </tr><tr> 
     <td>D</td> 
     <td>E</td> 
     <td>F</td> 
    </tr><tr> 
     <td class="text-info">G</td> 
    </tr> 
</table> 
END; 

$dom = new DOMDocument();//Loads DOM document 
$dom->loadHTML($str);//Loads HTML from a previously set variable 
$xpath = new DOMXPath($dom); 
$tables = $xpath->query('//table[@class="behaviourtable table"]');//Get only table from HTML 
$commsTable = ''; 
foreach ($tables as $table) { 
    $commsTable .= $dom->saveXML($table); 
} 

$commsHTML = new DOMDocument(); 
$commsHTML->loadHTML($commsTable); 

$tr = $commsHTML->getElementsByTagName('tr'); 


$th = $commsHTML->createElement('th', 'Comment'); 
$tr->item(0)->appendChild($th); 

$xpathcomms = new DOMXPath($commsHTML); 
$comments = $xpathcomms->query('//td[@class="text-info"]'); 
if($comments->length > 0){ 
    foreach($comments as $comment){ 
     $parent = $comment->parentNode; 
     $parent->previousSibling->appendChild($comment); 
    } 
} 

echo $commsHTML->saveHTML();

检查这个窝king示例：
https://3v4l.org/FZkNE

来源

2016-10-16 14:40:34 Dekel

PHP的DOM HTML表操作

回答

相关问题