如何使用PHP检索HTML标记内的纯文本？

Question

I have a form which is accepts HTML data, but we need only their respective text, not anything else. Is there any particular way to extract the text out of the HTML in PHP?

Answer 1

使用strip_tags（） 。

Answer 2

Surely it can be done:

Just look at this function and use it as you like:

function html2txt ($document)
{
    $search = array (
            "'<script[^>]*?>.*?</script>'si", // Strip out JavaScript code
            "'<[\/\!]*?[^<>]*?>'si",          // Strip out HTML tags
            "'([\r\n])[\s]+'",                // Strip out white space
            "'@<![\s\S]*?�[ \t\n\r]*>@'",   
            "'&(quot|#34|#034|#x22);'i",      // Replace HTML entities
            "'&(amp|#38|#038|#x26);'i",       // Added hexadecimal values
            "'&(lt|#60|#060|#x3c);'i",
            "'&(gt|#62|#062|#x3e);'i",
            "'&(nbsp|#160|#xa0);'i",
            "'&(iexcl|#161);'i",
            "'&(cent|#162);'i",
            "'&(pound|#163);'i",
            "'&(copy|#169);'i",
            "'&(reg|#174);'i",
            "'&(deg|#176);'i",
            "'&(#39|#039|#x27);'",
            "'&(euro|#8364);'i",         // Europe
            "'&a(uml|UML);'",            // German
            "'&o(uml|UML);'",
            "'&u(uml|UML);'",
            "'&A(uml|UML);'",
            "'&O(uml|UML);'",
            "'&U(uml|UML);'",
            "'&szlig;'i",
            );
    $replace = array (    "",
                "",
                " ",
                "\"",
                "&",
                "<",
                ">",
                " ",
                chr(161),
                chr(162),
                chr(163),
                chr(169),
                chr(174),
                chr(176),
                chr(39),
                chr(128),
                "ä",
                "ö",
                "ü",
                "�",
                "�",
                "�",
                "�",
            );

    $text = preg_replace($search, $replace, $document);

    return trim ($text);
}

Answer 3

You can parse the HTML using DOMDocument::loadHTMLFile and extract what you need.

$doc = new DOMDocument();
$doc->loadHTMLFile("data.html");
$metaTags = $doc->getElementsByTagName('meta');
// Process $metaTags