julio_readable_duration.php

function julio_readable_duration( $entry ) {
	if ( ! is_numeric( $entry ) ) {
		$coeff    = [ 1, MINUTE_IN_SECONDS, HOUR_IN_SECONDS, DAY_IN_SECONDS, MONTH_IN_SECONDS, YEAR_IN_SECONDS ];
		$data     = array_reverse( array_map( 'intval', explode( ':', $entry ) ) );
		$entry    = 0;
		foreach ( $data as $index => $time ) {
			$entry += $time * $coeff[ $index ];
		}
		if ( ! $entry ) {
			trigger_error( 'Entry data must be numeric or respect format dd:hh:mm:ss' );
			return;
		}
	}
	$from   = new \DateTime( '@0' );
	$to     = new \DateTime( "@$entry" );
	$data   = explode( ':', $from->diff( $to )->format('%s:%i:%h:%d:%m:%y') );
	$return = [];
	$labels = [ _n_noop( '%s second', '%s seconds' ),
				_n_noop( '%s minute', '%s minutes' ),
				_n_noop( '%s hour', '%s hours' ),
				_n_noop( '%s day', '%s days' ),
				_n_noop( '%s month', '%s months' ),
				_n_noop( '%s year', '%s years' ),
	];

	foreach( $data as $i => $time ) {
		$return[] = sprintf( translate_nooped_plural( $labels[ $i ], $time ), $time );
	}

	$return = array_reverse( $return );
	$text   = wp_sprintf( '%l', $return );

	return $text;
}