wapmorgan / Morphos

src/TimeSpeller.php

<?php
namespace morphos;

use DateInterval;

abstract class TimeSpeller
{
    const YEAR = 'year';
    const MONTH = 'month';
    const DAY = 'day';
    const HOUR = 'hour';
    const MINUTE = 'minute';
    const SECOND = 'second';

    const AGO = 'ago';
    const IN = 'in';

    const AND_WORD = 'and';

    const JUST_NOW = 'just now';

    const DIRECTION = 1;
    const SEPARATE = 2;

    public static function spellUnit($count, $unit) {}

    public static function spellInterval(DateInterval $interval, $options = 0)
    {
        $parts = [];
        foreach ([
            'y' => self::YEAR,
            'm' => self::MONTH,
            'd' => self::DAY,
            'h' => self::HOUR,
            'i' => self::MINUTE,
            's' => self::SECOND
        ] as $interval_field => $unit) {
            if ($interval->{$interval_field} > 0) {
                $parts[] = static::spellUnit($interval->{$interval_field}, $unit);

Are you sure the assignment to $parts[] is correct as static::spellUnit($interval->{$interval_field}, $unit) (which targets morphos\TimeSpeller::spellUnit()) seems to always return null.

            }
        }

        if (empty($parts)) {
            return static::JUST_NOW;
        }

        if ($options & self::SEPARATE && count($parts) > 1) {
            $last_part = array_pop($parts);
            $spelled = implode(', ', $parts).' '.static::AND_WORD.' '.$last_part;
        } else {
            $spelled = implode(' ', $parts);
        }

        if ($options & self::DIRECTION) {
            if ($interval->invert) {
                $spelled = static::IN.' '.$spelled;
            } else {
                $spelled .= ' '.static::AGO;
            }
        }

        return $spelled;
    }
}