<?php

echo 'event happened ' . humanTiming(time()-500);

function humanTiming($time) {  //humanTiming accepts unix timestamp $time, outputs time elapsed since $time in human readable format
    $YEAR = 31536000; //number of seconds in a year
    $MONTH = 2592000; //etc
    $WEEK = 604800;
    $DAY = 86400;
    $HOUR = 3600;
    $MIN = 60;
    $SEC = 1;

    $difference = time() - $time; //difference is current time minus the input time

    if ($difference < 1)
        $difference = 1;  //round up to 1 second if difference is less

    if ($difference > $YEAR) { //if it's been over a year
        $numYears = floor($difference/$YEAR); //number of years = the time difference in seconds divided by how many seconds are in a year, rounded down to a whole number by floor()
        if ($numYears > 1)
            return $numYears . 'years ago';
        else //$numyears == 1
            return '1 year ago';
    }
    else if ($difference > $MONTH) { //if it's been over a month
        $numMonths = floor($difference/$MONTH); //figure out number of months
        if ($numMonths > 1)
            return $numMonths . 'months ago';
        else //$numMonths == 1
            return '1 month ago';
    }
    else if ($difference > $WEEK) {
        $numWeeks = floor($difference/$WEEK);
        if ($numWeeks > 1)
            return $numWeeks . 'weeks ago';
        else //$numWeeks == 1
            return '1 week ago';
    }
    else if ($difference > $DAY) {
        $numDays = floor($difference/$DAY);
        if ($numDays > 1)
            return $numDays . 'days ago';
        else //$numDays == 1
            return '1 day ago';
    }
    else if ($difference > $HOUR) {
        $numHours = floor($difference/$HOUR);
        if ($numHours > 1)
            return $numHours . 'hours ago';
        else //$numHours == 1
            return '1 hour ago';
    }
    else if ($difference > $MIN) {
        $numMins = floor($difference/$MIN);
        if ($numMins > 1)
            return $numMins . 'minutes ago';
        else //$numMins == 1
            return '1 minute ago';
    }
    else { //it's been less than a minute
        $numSecs = floor($difference); //difference is already in seconds, just make sure it is whole number
        if ($numSecs > 1)
            return $numSecs . 'seconds ago';
        else //$numSecs == 1
            return '1 second ago'; //damn nice
    }

    return 0; //we should never get here, somethings broke
} //humanTiming()


?>