wp_spaces_regexp() WordPress Function

function wp_spaces_regexp() {
	static $spaces = '';

	if ( empty( $spaces ) ) {
		/**
		 * Filters the regexp for common whitespace characters.
		 *
		 * This string is substituted for the \s sequence as needed in regular
		 * expressions. For websites not written in English, different characters
		 * may represent whitespace. For websites not encoded in UTF-8, the 0xC2 0xA0
		 * sequence may not be in use.
		 *
		 * @since 4.0.0
		 *
		 * @param string $spaces Regexp pattern for matching common whitespace characters.
		 */
		$spaces = apply_filters( 'wp_spaces_regexp', '[\r\n\t ]|\xC2\xA0|&nbsp;' );
	}

	return $spaces;
}
Uses	Description
wp-includes/formatting.php:wp_spaces_regexp	Filters the regexp for common whitespace characters.
wp-includes/plugin.php:apply_filters()	Calls the callback functions that have been added to a filter hook.
Used By	Description
wp-includes/formatting.php:wptexturize_primes()	Implements a logic tree to determine whether or not “7′.” represents seven feet, then converts the special char into either a prime char or a closing quote char.
wp-includes/formatting.php:wptexturize()	Replaces common plain text characters with formatted entities.
wp-includes/formatting.php:shortcode_unautop()	Don’t auto-p wrap shortcodes that stand alone.
wp-includes/functions.php:smilies_init()	Convert smiley code to the icon graphic file equivalent.