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<?php $str = "<input type=\"text\">\n<img src=\"\"><a href=\"\"><button type=\"button\"></button><div id=\"some\"></div><p></p>"; var_dump(removeTags($str, array('img'))); /** * Strip only certain tags in the given HTML string * @return String */ function removeTags($html, $tags){ $existing_tags = getAllTagNames($html); $allowable_tags = '<'.implode('><', array_diff($existing_tags, $tags)).'>'; return strip_tags($html, $allowable_tags); } /** * Get a list of tag names in the provided HTML string * @return Array */ function getAllTagNames($html){ $tags = array(); $part = explode("<", $html); foreach($part as $tag){ $chunk = explode(" ", $tag); if(empty($chunk[0]) || $chunk[0][0] == "/") continue; $tag = trim($chunk[0], " >"); if(!in_array($tag, $tags)) $tags[] = $tag; } return $tags; }
Output for 4.3.1 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.30, 7.4.0 - 7.4.23, 8.0.0 - 8.0.11, 8.1rc1
string(90) "<input type="text"> <a href=""><button type="button"></button><div id="some"></div><p></p>"

preferences:
110.65 ms | 462 KiB | 5 Q