Removing All HTML Tags Except Permitted Ones in PHP
Users frequently encounter the need to remove specific or all HTML tags from a string. However, a unique scenario arises when only certain tags are to be retained while all others are stripped. In PHP, the built-in strip_tags function provides a solution for this requirement.
Solution:
The strip_tags function allows you to select specific tags that should be exempted from removal. By passing a string of the permitted tags as the second argument, you can strip all tags except those specified:
<code class="php">$allowed_tags = '<code><p>'; $content = strip_tags($input, $allowed_tags);</code>
In this code:
- $input is the original HTML string.
- $allowed_tags is a string containing the tags that should be kept (e.g.,
and).
- $content is the resulting string with all tags stripped except for the allowed ones.
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