PHP strip_tags method to retain multiple HTML tags, strip_tags tag_PHP tutorial

PHP strip_tags method to retain multiple HTML tags, strip_tags tags

This article introduces the method of PHP strip_tags function to retain multiple HTML tags. You can use the second parameter to set The tags that need to be deleted mainly involve the second parameter of strip_tags

strip_tags function

Grammar
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 removed.

How to use:

Premise: If there is such a string now,

Copy code The code is as follows:
$str = "

I am fromBangke Home

1, do not retain any HTML tags, the code will be like this:
Copy code The code is as follows:
echo strip_tags($str);
// Output: I am from Bangke Home

2. If you only retain one tag , you only need to write the string into the second parameter of strip_tags:

Copy code The code is as follows:
echo strip_tags($str, "");
// Output: I am fromBangke Home

3. To retain multiple tags of

and ..., you only need to separate multiple tags with spaces and write them to the second parameter of strip_tags:

Copy code The code is as follows:
echo strip_tags($str, "

");
// Output:

I am fromBang Ke Home

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'));