Bri*_*ham 1 php regex preg-replace
如何从以下字符串中的class =""之间删除重复项？
<li class="active active"><a href="http://netcoding.net/indev/sample-page/">Sample Page</a></li>
请注意,所显示的课程可能会发生变化并处于不同的位置.
您可以使用DOM解析器然后explode和array_unique:
$html = '<li class="active active">
<a href="http://netcoding.net/indev/sample-page/">Sample Page</a></li>';
$doc = new DOMDocument();
libxml_use_internal_errors(true);
$doc->loadHTML($html); // loads your html
$xpath = new DOMXPath($doc);
$nodelist = $xpath->query("//li");
for($i=0; $i < $nodelist->length; $i++) {
$node = $nodelist->item($i);
$tok = explode(' ', $node->getAttribute('class'));
$tok = array_unique($tok);
$node->setAttribute('class', implode(' ', $tok));
}
$html = $doc->saveHTML();
echo $html;
<html><body>
<li class="active"><a href="http://netcoding.net/indev/sample-page/">Sample Page</a></li>
</body></html>