Wordpress function to insert post or comment timestamp as relative (i.e. 2 weeks ago), or as date, depending on $duration (Default 60 days)

human-time-diff.php

<?php
// Show relative time if more recent than 60 days for post or comment
function adamdehaven_human_time_diff( $type = 'post', $duration = 60 ) {

    if($type == 'comment') {
        $post_time = get_comment_time('U');
    } else {
        $post_time = get_the_time('U');
    }
    $human_time = '';
    $time_now = date('U');

    // use human time if less that $duration days ago (60 days by default)
    // 60 seconds * 60 minutes * 24 hours * $duration days
    if ( $post_time > $time_now - ( 60 * 60 * 24 * $duration ) ) {
        if($type == 'comment') {
            $human_time = sprintf( __( '%s ago', 'adamdehaven'), human_time_diff( $post_time, current_time( 'timestamp' ) ) );
        } else {
            $human_time = sprintf( __( 'Posted %s ago', 'adamdehaven'), human_time_diff( $post_time, current_time( 'timestamp' ) ) );
        }
    } else {
        if($type == 'comment') {
            $human_time = get_comment_date().' at '.get_comment_time('g:i A');
        } else {
            $human_time = get_the_date();
        }
    }
    echo $human_time;
}