提取html标签外的文本[关闭]

Question

I am trying to extract text using preg_match() which is not contained in tags like <p> or <img>. This text is retrieved from a database and I am working in PHP.

This should be extracted <p>I do not want this</p> This should be extracted <a>This may appear after other tags and I do not want this</a>

I have tried to do (.*)(<p>|<a>|<\/p>|<\/a>)(.*) but this will capture everything up till the last tag and the earlier tags are captured together with text outside of tags.

I have tried to search on Stackoverflow like this: Match text outside of html tags but the regex provided has a pattern error when I pasted it in regex101.com.

Would appreciate any help on this, thanks.

Answer 1

You can use PHP's DOMDocument and DOMXPath to get the values that you want. The trick is to wrap the HTML from your database in a (for example) <div> tag, and you can then load it into a DOMDocument and use DOMXPath to search for children of the <div> tag which are purely text using the text() path:

$html = 'This should be extracted <p>I do not want this</p> This should also be extracted <a>This may appear after other tags and I do not want this</a>';
$doc = new DOMDocument();
$doc->loadHTML("<div>$html</div>", LIBXML_HTML_NODEFDTD | LIBXML_HTML_NOIMPLIED);
$xpath = new DOMXPath($doc);
$texts = array();
foreach ($xpath->query('/div/text()') as $text) {
    $texts[] = $text->nodeValue;
}
print_r($texts);

Output:

Array ( 
    [0] => This should be extracted
    [1] =>  This should also be extracted 
)

Demo on 3v4l.org