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Remove HTML tags from a string except p, b, i and br in PHP

Question:
How to remove HTML tags from a string except p, b, i and br in PHP?
Answer:
$text = '<div class="test"><p>Clean <a href="#">text</a><br><b>Bold</b> text</p></div>';

$cleanText = strip_tags($text, ['p','b','i','br']);
Description:

Removing all HTML tags from a string in PHP is a quite simple task using the built-in strip_tags function. However, in some cases, you want to allow some elements. Fortunately, the strip_tags function allows this as well. As a second parameter, you can list the allowed tags as an array.

Note: This function should not be used to try to prevent XSS attacks. It does not modify any attributes on the tags that you allow.

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remove html tags except, allow tags for strip_tags
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Remove HTML tags from a string except p, b, i and br in PHP