PHP strip_tags methods for keeping multiple HTML tags, strip_tags tags _php tutorials

PHP strip_tags methods for keeping multiple HTML tags, strip_tags tags

This article describes the PHP strip_tags function to preserve multiple HTML tags, you can use the second parameter to set a label that does not need to be deleted, mainly related to the second parameter of Strip_tags

Strip_tags function

Grammar
String Strip_tags (String str [, String allowable_tags])
Returns a string that removes the HTML tag; You can use the second parameter to set a label that does not need to be deleted.

How to use:

Premise: If there is such a string now,

Copy the Code code as follows:
$str = "

I'm from the Help house .

";

1, do not keep any HTML tags, the code will be like this:
Copy the Code code as follows:
echo Strip_tags ($STR);
Output: I'm from the Help house.

2, to keep only one label, just write the string to the second parameter of Strip_tags:

Copy the Code code as follows:
Echo strip_tags ($str, "");
Output: I'm from the Help house.

3, to keep

With the. Multiple labels, you only need to separate multiple labels with a space and write to the second parameter of Strip_tags:

Copy the Code code as follows:
Echo strip_tags ($str, "

");
Output:

I'm from the Help house .

What if you want to use PHP to remove specific tags from HTML tags?

This requires code to be implemented, 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.        ' [^>]*> ([^<]*)
 
     /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 '));

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