) {
	$text = wp_encode_emoji( $text );

	/** This filter is documented in wp-includes/formatting.php */
	$cdn_url = apply_filters( 'emoji_url', 'https://s.w.org/images/core/emoji/2.2.1/72x72/' );

	/** This filter is documented in wp-includes/formatting.php */
	$ext = apply_filters( 'emoji_ext', '.png' );

	$output = '';
	/*
	 * HTML loop taken from smiley function, which was taken from texturize function.
	 * It'll never be consolidated.
	 *
	 * First, capture the tags as well as in between.
	 */
	$textarr = preg_split( '/(<.*>)/U', $text, -1, PREG_SPLIT_DELIM_CAPTURE );
	$stop = count( $textarr );

	// Ignore processing of specific tags.
	$tags_to_ignore = 'code|pre|style|script|textarea';
	$ignore_block_element = '';

	for ( $i = 0; $i < $stop; $i++ ) {
		$content = $textarr[$i];

		// If we're in an ignore block, wait until we find its closing tag.
		if ( '' == $ignore_block_element && preg_match( '/^<(' . $tags_to_ignore . ')>/', $content, $matches ) )  {
			$ignore_block_element = $matches[1];
		}

		// If it's not a tag and not in ignore block.
		if ( '' ==  $ignore_block_element && strlen( $content ) > 0 && '<' != $content[0] ) {
			$matches = array();
			if ( preg_match_all( '/(&#x1f1(e[6-9a-f]|f[0-9a-f]);){2}/', $content, $matches ) ) {
				if ( ! empty( $matches[0] ) ) {
					foreach ( $matches[0] as $flag ) {
						$chars = str_replace( array( '&#x', ';'), '', $flag );

						list( $char1, $char2 ) = str_split( $chars, 5 );
						$entity = sprintf( '<img src="%s" alt="%s" class="wp-smiley" style="height: 1em; max-height: 1em;" />', $cdn_url . $char1 . '-' . $char2 . $ext, html_entity_decode( $flag ) );

						$content = str_replace( $flag, $entity, $content );
					}
				}
			}

			// Loosely match the Emoji Unicode range.
			$regex = '/(&#x[2-3][0-9a-f]{3};|&#x1f[1-6][0-9a-f]{2};)/';

			$matches = array();
			if ( preg_match_all( $regex, $content, $matches ) ) {
				if ( ! empty( $matches[1] ) ) {
					foreach ( $matches[1] as $emoji ) {
						$char = str_replace( array( '&#x', ';'), '', $emoji );
						$entity = sprintf( '<img src="%s" alt="%s" class="wp-smiley" style="height: 1em; max-height: 1em;" />', $cdn_url . $char . $ext, html_entity_decode( $emoji ) );

						$content = str_replace( $emoji, $entity, $content );
					}
				}
			}
		}

		// Did we exit ignore block.
		if ( '' != $ignore_block_element && '</' . $ignore_block_element . '>' == $content )  {
			$ignore_block_element = '';
		}

		$output .= $content;
	}

	return $output;
}

/**
 * Convert emoji in emails into static images.
 *
 * @since 4.2.0
 *
 * @param array $mail The email data array.
 * @return array The email data array, with emoji in the message staticized.
 */
function wp_staticize_emoji_for_email( $mail ) {
	if ( ! isset( $mail['message'] ) ) {
		return $mail;
	}

	/*
	 * We can only transform the emoji into images if it's a text/html email.
	 * To do that, here's a cut down version of the same process that happens
	 * in wp_mail() - get the Content-Type from the headers, if there is one,
	 * then pass it through the wp_mail_content_type filter, in case a plugin
	 * is handling changing the Content-Type.
	 */
	$headers = array();
	if ( isset( $mail['headers'] ) ) {
		if ( is_array( $mail['headers'] ) ) {
			$headers = $mail['headers'];
		} else {
			$headers = explode( "\n", str_replace( "\r\n", "\n", $mail['headers'] ) );
		}
	}

	foreach ( $headers as $header ) {
		if ( strpos($header, ':') === false ) {
			continue;
		}

		// Explode them out.
		list( $name, $content ) = explode( ':', trim( $header ), 2 );

		// Cleanup crew.
		$name    = trim( $name    );
		$content = trim( $content );

		if ( 'content-type' === strtolower( $name ) ) {
			if ( strpos( $content, ';' ) !== false ) {
				list( $type, $charset ) = explode( ';', $content );
				$content_type = trim( $type );
			} else {
				$content_type = trim( $content );
			}
			break;
		}
	}

	// Set Content-Type if we don't have a content-type from the input headers.
	if ( ! isset( $content_type ) ) {
		$content_type = 'text/plain';
	}

	/** This filter is documented in wp-includes/pluggable.php */
	$content_type = apply_filters( 'wp_mail_content_type', $content_type );

	if ( 'text/html' === $content_type ) {
		$mail['message'] = wp_staticize_emoji( $mail['message'] );
	}

	return $mail;
}

/**
 * Shorten a URL, to be used as link text.
 *
 * @since 1.2.0
 * @since 4.4.0 Moved to wp-includes/formatting.php from wp-admin/includes/misc.php and added $length param.
 *
 * @param string $url    URL to shorten.
 * @param int    $length Optional. Maximum length of the shortened URL. Default 35 characters.
 * @return string Shortened URL.
 */
function url_shorten( $url, $length = 35 ) {
	$stripped = str_replace( array( 'https://', 'http://', 'www.' ), '', $url );
	$short_url = untrailingslashit( $stripped );

	if ( strlen( $short_url ) > $length ) {
		$short_url = substr( $short_url, 0, $length - 3 ) . '&hellip;';
	}
	return $short_url;
}

/**
 * Sanitizes a hex color.
 *
 * Returns either '', a 3 or 6 digit hex color (with #), or nothing.
 * For sanitizing values without a #, see sanitize_hex_color_no_hash().
 *
 * @since 3.4.0
 *
 * @param string $color
 * @return string|void
 */
function sanitize_hex_color( $color ) {
	if ( '' === $color ) {
		return '';
	}

	// 3 or 6 hex digits, or the empty string.
	if ( preg_match('|^#([A-Fa-f0-9]{3}){1,2}$|', $color ) ) {
		return $color;
	}
}

/**
 * Sanitizes a hex color without a hash. Use sanitize_hex_color() when possible.
 *
 * Saving hex colors without a hash puts the burden of adding the hash on the
 * UI, which makes it difficult to use or upgrade to other color types such as
 * rgba, hsl, rgb, and html color names.
 *
 * Returns either '', a 3 or 6 digit hex color (without a #), or null.
 *
 * @since 3.4.0
 *
 * @param string $color
 * @return string|null
 */
function sanitize_hex_color_no_hash( $color ) {
	$color = ltrim( $color, '#' );

	if ( '' === $color ) {
		return '';
	}

	return sanitize_hex_color( '#' . $color ) ? $color : null;
}

/**
 * Ensures that any hex color is properly hashed.
 * Otherwise, returns value untouched.
 *
 * This method should only be necessary if using sanitize_hex_color_no_hash().
 *
 * @since 3.4.0
 *
 * @param string $color
 * @return string
 */
function maybe_hash_hex_color( $color ) {
	if ( $unhashed = sanitize_hex_color_no_hash( $color ) ) {
		return '#' . $unhashed;
	}

	return $color;
}