The PHP version implements a friendly time display method (such as: 1 minute ago)

Complete php class, usually I use it with smary for quick use.

<?PHP
/* 
* Data time functions.
  // * 模块
*/
defined('TSKY') || die('Permission Denied!');

function fmtMonth($month){
    return date('F, Y',day2time($month.'01'));
}

// 
function fmt_month($ts) {
    return strftime("%b,%Y",$ts);
}

// 03:02
function shartTime($ts) {
    return strftime("%H:%M",$ts);
}
// 03:02:01
function longTime($ts) {
    return strftime("%T",$ts);
}
//4月18日
function shortDate($ts) {
    return date("n月d日",$ts);
}
//2006年4月18日
function longDate($ts) {
    return date("Y年n月d日",$ts);
}

function dateTime($ts) {
    return date("Y年n月d日 H:i:s",$ts);
}
function fullDateTime($ts) {
    return date("Y年n月d日 ",$ts).week($ts);
}
function week($ts) {
    global $lang;
    return  $lang['weekDay'][date('w',$ts)];
}

function relatively_date($date) {
    if (!preg_match('/^\d+$/', $date)) $date = strtotime(trim($date));
    $sec = time() - $date;
    switch(true){
        case $sec < 3600:
            return round($sec/60). ' 分钟前';
        case $sec < 86400:
            return round($sec/3600). ' 小时前';
        case $sec < (86400 * 7):
            return round($sec/86400). ' 天前';//days ago
        case $sec < (86400 * 7 * 4):
            return round($sec/(86400*7)). ' 周前'; //weeks ago
        default:
            return longDate($date);
    }
}

function nextMonth($month/*200512->200601*/){
    return date('Ym',strtotime('+1 month',strtotime($month.'01')));
}
function prevMonth($month/*200512->200511*/){
    return date('Ym',strtotime('-1 month',strtotime($month.'01')));
}
function prevDay($day/*20050826*/){
    $day = substr($day,0,8);
    return date('Ymd',strtotime('-1 day',strtotime($day)));
}

function nextDay($day/*20050826*/){
    $day = substr($day,0,8);
    return date('Ymd',strtotime('+1 day',strtotime($day)));
}
function nextExistsDay($day/*20050109*/){
    $day = nextDay($day);
    while(!hasTopic($day) && $day < TODAY){
        $day = nextDay($day);
    }
    return hasTopic($day) ? $day : false;
}
function prevExistsDay($day/*20050109*/){
    global $cfg;
    $day = prevDay($day);
    while(!hasTopic($day) && (int)$day > $cfg->origDate){
        $day = prevDay($day);
    }
    return hasTopic($day) ? $day : false;
}


function prev_day($day){$day = substr($day,0,8);return date('Ymd',strtotime('-1 day',strtotime($day)));}
function long_date($ts){return date("Y年n月d日",$ts);}
function day2time($day){return @strtotime($day);}





/*
echo "<pre class="brush:php;toolbar:false">";
echo strftime("a%a\n"); //  a  星期二             
echo strftime("A%A\n"); //  A  星期二             
echo strftime("b%b\n"); //  b  四月               
echo strftime("B%B\n"); //  B  四月               
echo strftime("c%c\n"); //  c  2006-4-18 3:48:11  
echo strftime("C%C\n"); //  C                     
echo strftime("d%d\n"); //  d  18                 
echo strftime("D%D\n"); //  D                     
echo strftime("e%e\n"); //  e                     
echo strftime("g%g\n"); //  g                     
echo strftime("G%G\n"); //  G                     
echo strftime("h%h\n"); //  h                     
echo strftime("H%H\n"); //  H  03                 
echo strftime("I%I\n"); //  I  03                 
echo strftime("j%j\n"); //  j  108                
echo strftime("m%m\n"); //  m  04                 
echo strftime("M%M\n"); //  M  48                 
echo strftime("n%n\n"); //  n                     
echo strftime("p%p\n"); //  p  上午               
echo strftime("r%r\n"); //  r                     
echo strftime("R%R\n"); //  R                     
echo strftime("S%S\n"); //  S  11                 
echo strftime("t%t\n"); //  t                     
echo strftime("T%T\n"); //  T                     
echo strftime("u%u\n"); //  u                     
echo strftime("U%U\n"); //  U  16                 
echo strftime("V%V\n"); //  V                     
echo strftime("W%W\n"); //  W  16                 
echo strftime("w%w\n"); //  w  2                  
echo strftime("x%x\n"); //  x  2006-4-18          
echo strftime("X%X\n"); //  X  3:48:11            
echo strftime("y%y\n"); //  y  06                 
echo strftime("Y%Y\n"); //  Y  2006               
echo strftime("Z%Z\n"); //  Z  中国标准时间       
echo strftime("%%%\n"); //  %                     
*/

The above introduces the PHP version to implement a friendly time display method (such as: 1 minute ago), including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.