<?php  
    //格式化时间，几分钟前，几小时前  
    function format_date($time){  
        $t = time()-$time;  
        $f = array(  
            '31536000'=>'年',  
            '2592000'=>'个月',  
            '604800'=>'星期',  
            '86400'=>'天',  
            '3600'=>'小时',  
            '60'=>'分钟',  
            '1'=>'秒'  
        );  
        foreach($f as $k=>$v){  
            if(0 != $c = floor($t/(int)$k)){  
                return $c.$v.'前';  
            }  
        }  
    }  
    echo format_date('1405959031');  
    ?>