url_shorten( string $url, int $length = 35 )

Shorten a URL, to be used as link text.

Parameters

$url

(string) (Required) URL to shorten.

$length

(int) (Optional) Maximum length of the shortened URL. Default 35 characters.

Default value: 35

Return

(string) Shortened URL.

Source

File: wp-includes/formatting.php

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 ) . '…';
	}
	return $short_url;
}

Changelog

Version Description
4.4.0 Moved to wp-includes/formatting.php from wp-admin/includes/misc.php and added $length param.
1.2.0 Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/url_shorten