PHP Relative Date

helper.php

/*
 * Relative Date.
 */
function relative_date( $date, $type = 'string' ) {
	$today_timestamp = strtotime( date( 'M j, Y' ) );
	$date_timestamp  = strtotime( $date );
	
	$diff = ( $date_timestamp - $today_timestamp ) / 86400;
	
	$html  = '';
	$tense = $diff > 0 ? 'future' : 'past';
	
	if ( $diff >= 0 && $diff < 1 ) {
		$html = 'Today';
	} elseif ( $diff >= 1 && $diff < 2 ) {
		$html = 'Tomorrow';
	} elseif ( $diff >= - 1 && $diff < 0 ) {
		$html = 'Yesterday';
	} elseif ( abs( $diff ) < 45 ) {
		if ( $diff > 0 ) {
			$diff = floor( $diff );
			
			$html = 'In ' . $diff . ' day' . ( $diff != 1 ? 's' : '' );
		} else {
			$diff = abs( floor( $diff ) );
			
			$html = $diff . ' day' . ( $diff != 1 ? 's' : '' ) . ' ago';
		}
	} else {
		$html = date( 'l, j F, Y', $date_timestamp ? $date_timestamp : time() );
	}
	
	if ( $type == 'array' ) {
		return [ 'string' => $html, 'tense' => $tense ];
	} else {
		return $html;
	}
}