(PHP 8 >= 8.4.0)
Dom\TokenList::replace — Replaces a token in the list with another one
public Dom\TokenList::replace(string $token, string $newToken): bool
Replaces a token in the list with another one.
tokennewTokenDom\SYNTAX_ERR if a token is the empty string. Dom\INVALID_CHARACTER_ERR if a token contains any ASCII whitespace. Example #1 Dom\TokenList::replace() example
Replaces a token in the paragraph with another one.
<?php
$dom = Dom\HTMLDocument::createFromString('<p class="font-bold important"></p>', LIBXML_NOERROR);
$p = $dom->body->firstChild;
$p->classList->replace('font-bold', 'font-small');
echo $dom->saveHtml($p);
?> The above example will output:
<p class="font-small important"></p>
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https://www.php.net/manual/en/dom-tokenlist.replace.php