update: wp_trim_words function to allow specific html tags

[up1512001]

Trac ticket:

https://core.trac.wordpress.org/ticket/59270

---

As wp_strip_all_tags function strips all HTML tags this won't allow doing any formatting to excerpt. I have used wp_kses() here with specific allowed HTML tags.

Allowed tag list

$allowed_tags = array(
		'a'      => array(
			'class' => array(),
			'style' => array(),
			'href'  => array(),
			'id'    => array(),
		),
		'strong' => array(),
		'b'      => array(),
		'em'     => array(),
		'img'    => array(
			'class'  => array(),
			'style'  => array(),
			'src'    => array(),
			'alt'    => array(),
			'width'  => array(),
			'height' => array(),
		),
		'mark'   => array(
			'class' => array(),
			'style' => array(),
		),
		'code'   => array(
			'class' => array(),
			'style' => array(),
		),
		'kbd'    => array(
			'class' => array(),
			'style' => array(),
		),
		'bdo'    => array(
			'class' => array(),
			'style' => array(),
			'dir'   => array(),
			'lang'  => array(),

		),
		'span'   => array(
			'class' => array(),
			'style' => array(),
		),
		'sup'    => array(
			'class' => array(),
			'style' => array(),
		),
		'sub'    => array(
			'class' => array(),
			'style' => array(),
		),
		's'      => array(
			'class' => array(),
			'style' => array(),
		),
	);

Example output

Screen.Recording.2024-06-13.at.12.28.18.mov

[github-actions]

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[up1512001]

Hi @swissspidy can you please review this PR?

[github-actions]

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[audrasjb]

Hi, thanks for the PR!

I think we should consider passing $allowed_tags as an argument of wp_trim_words() so we can 1) make it optional (and maybe disabled by default?); 2) allow extenders to customize it their way.

What do you think?

[up1512001]

@audrasjb we can definitely do that.

[audrasjb]

Thanks for the update. We also need a since mention in the docblock :)

[up1512001]

@mukeshpanchal27 @audrasjb any update for this PR?

[up1512001]

@swissspidy can you please review this PR?

[swissspidy]

Why me specifically? 😅 I am on vacation

[up1512001]

@swissspidy Sorry for disturbing you.

[up1512001]

added all possible tags & styles to support excerpt styling.