WP_Embed::maybe_make_link( string $url ): string|false

Source

public function maybe_make_link( $url ) {
	if ( $this->return_false_on_fail ) {
		return false;
	}

	$output = ( $this->linkifunknown ) ? '<a href="' . esc_url( $url ) . '">' . esc_html( $url ) . '</a>' : $url;

	/**
	 * Filters the returned, maybe-linked embed URL.
	 *
	 * @since 2.9.0
	 *
	 * @param string $output The linked or original URL.
	 * @param string $url    The original URL.
	 */
	return apply_filters( 'embed_maybe_make_link', $output, $url );
}

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