PHP strip_tags method to retain multiple HTML tags
This article introduces the method of PHP strip_tags function to retain multiple HTML tags. You can use the second parameter to set tags that do not need to be deleted, mainly involving the second parameter of strip_tags
strip_tags function
Syntax
string strip_tags (string str [, string allowable_tags])
Returns a string with HTML tags removed; you can use the second parameter to set tags that do not need to be deleted.
Usage:
Premise: If there is such a string now,
$str = "<p>我来自<b><a href='http://www.php.cn'>PHP中文网</a></b></p>";
1, without retaining any HTML tags, the code will be like this:
echo strip_tags($str); // 输出：我来自PHP中文网
2. If you want to retain only the tag, you only need to write the string into the second parameter of strip_tags:
echo strip_tags($str, "<a>"); // 输出：我来自<a href='http://www.php.cn'>PHP中文网</a>
3. To retain
and < ;b>...Multiple tags, just separate the multiple tags with spaces and write them to the second parameter of strip_tags:
echo strip_tags($str, "<p> <b>"); // 输出：<p>我来自<b>PHP中文网</b></p>
What if you want to use php to delete specific tags in the html tag?
This requires code to implement, as follows:
function strip_selected_tags($text, $tags = array()) {
$args = func_get_args();
$text = array_shift($args);
$tags = func_num_args() > 2 ? array_diff($args, array($text)) : (array) $tags;
foreach($tags as $tag) {
if (preg_match_all('/<'.$tag.
'[^>]*>([^<]*)</'.$tag.
'>/iu', $text, $found)) {
$text = str_replace($found[0], $found[1], $text);
}
}
return preg_replace('/(<('.join('|', $tags).
')( | |.)*/>)/iu', '', $text);
}
$str = "[url="] 123[/url]";
echo strip_selected_tags($str, array('b'));##Please pay attention to more related articles on how PHP strip_tags retains multiple HTML tags. PHP Chinese website!
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