正则表达式查找html div类的内容和数据属性? (preg_match_all) [英] Regex to find html div class content and data-attr? (preg_match_all)
问题描述
使用preg_match_all我想获取html中的类和数据属性.
下面的示例有效,但,它仅返回类名称或仅 data-id 内容. /p>
我希望示例模式可以同时找到类和数据ID内容.
我应该使用哪个正则表达式模式?
HTML内容:
<!-- I want to: $matches[1] == test_class | $matches[2] == null -->
<div class="test_class">
<!-- I want to: $matches[1] == test_class | $matches[2] == 1 -->
<div class="test_class" data-id="1">
<!-- I want to: $matches[1] == test_class | $matches[2] == 1 -->
<div id="test_id" class="test_class" data-id="1">
<!-- I want to: $matches[1] == test_class test_class2 | $matches[2] == 1 -->
<div class="test_class test_class2" id="test_id" data-id="1">
<!-- I want to: $matches[1] == 1 | $matches[2] == test_class test_class2 -->
<div data-id="1" class="test_class test_class2" id="test_id" >
<!-- I want to: $matches[1] == 1 | $matches[2] == test_class test_class2 -->
<div id="test_id" data-id="1" class="test_class test_class2">
<!-- I want to: $matches[1] == test_class | $matches[2] == 1 -->
<div class="test_class" id="test_id" data-id="1">
无法正常运行的正则表达式:
$pattern = '/<(div|i)\s.*(class|data-id)="([^"]+)"[^>]*>/i';
preg_match_all($pattern, $content, $matches, PREG_SET_ORDER);
谢谢.
为什么不使用DOM解析器呢?
您可以使用//div[@class or @data-id]
之类的XPath表达式来定位元素,然后提取其属性值
$doc = new DOMDocument();
$doc->loadHTML($html);
$xpath = new DOMXpath($doc);
$divs = $xpath->query('//div[@class or @data-id]');
foreach ($divs as $div) {
$matches = [$div->getAttribute('class'), $div->getAttribute('data-id')];
print_r($matches);
}
With preg_match_all I want to get class and data-attributes in html.
The example below works, but it only returns class names or only data-id content.
I want the example pattern to find both class and data-id content.
Which regex pattern should I use?
Html contents:
<!-- I want to: $matches[1] == test_class | $matches[2] == null -->
<div class="test_class">
<!-- I want to: $matches[1] == test_class | $matches[2] == 1 -->
<div class="test_class" data-id="1">
<!-- I want to: $matches[1] == test_class | $matches[2] == 1 -->
<div id="test_id" class="test_class" data-id="1">
<!-- I want to: $matches[1] == test_class test_class2 | $matches[2] == 1 -->
<div class="test_class test_class2" id="test_id" data-id="1">
<!-- I want to: $matches[1] == 1 | $matches[2] == test_class test_class2 -->
<div data-id="1" class="test_class test_class2" id="test_id" >
<!-- I want to: $matches[1] == 1 | $matches[2] == test_class test_class2 -->
<div id="test_id" data-id="1" class="test_class test_class2">
<!-- I want to: $matches[1] == test_class | $matches[2] == 1 -->
<div class="test_class" id="test_id" data-id="1">
The regex that does not work as I want:
$pattern = '/<(div|i)\s.*(class|data-id)="([^"]+)"[^>]*>/i';
preg_match_all($pattern, $content, $matches, PREG_SET_ORDER);
Thanks in advance.
Why not use a DOM parser instead?
You could use an XPath expression like //div[@class or @data-id]
to locate the elements then extract their attribute values
$doc = new DOMDocument();
$doc->loadHTML($html);
$xpath = new DOMXpath($doc);
$divs = $xpath->query('//div[@class or @data-id]');
foreach ($divs as $div) {
$matches = [$div->getAttribute('class'), $div->getAttribute('data-id')];
print_r($matches);
}
Demo ~ https://eval.in/1046227
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