[WordPress] Enabling iframes for posts retrieved with shortcodes.

I had defined a shortcode in function.php and retrieved the articles in it. I solved this problem because I could not display the article properly if there was an iframe in the article.

WordPress provides the ‘wp_kses_allowed_html’ function, so I used this.

The ‘wp_kses_allowed_html’ allows HTML tags to be allowed by giving them to the context.

WordPress Developer Resources

wp_kses_allowed_html() – Function | Developer.WordPress.org Returns an array of allowed HTML tags and attributes for a given context.

Simply define the tag ‘iframe’ that you want to allow and its attributes that you want to allow in an array.

function custom_wpkses_post_tags( $tags, $context ) {
	if ( 'post' === $context ) {
		$tags['iframe'] = array(
			'src'             => true,
			'height'          => true,
			'width'           => true,
			'frameborder'     => true,
			'allowfullscreen' => true,
		);
	}

	return $tags;
}

add_filter( 'wp_kses_allowed_html', 'custom_wpkses_post_tags', 10, 2 );

The implementation is simple. This content is based on an issue on GitHub. Thanks to our predecessors.