PHP day week month click ranking statistics

 
$now=time(); // The current time  
$StrUpdate = "Update $tbl_article set hits=hits+1"; 
if(date("d",$lasthittime)==date("d",$now)){// with 1 day  
$StrUpdate = $StrUpdate.",dayhits = dayhits+1"; 
}else{ 
$StrUpdate = $StrUpdate.",dayhits = 0"; 
} 
if(date("W",$lasthittime)==date("W",$now)){// with 1 weeks  
$StrUpdate = $StrUpdate.",weekhits = weekhits+1"; 
}else{ 
$StrUpdate = $StrUpdate.",weekhits = 0"; 
} 
if(date("m",$lasthittime)==date("m",$now)){// with 1 month  
$StrUpdate = $StrUpdate.",monthhits = monthhits+1"; 
}else{ 
$StrUpdate = $StrUpdate.",monthhits = 0"; 
} 
$StrUpdate = $StrUpdate.",lasthittime='$now' where id='$id'"; // Update click time  
$fsql->query($StrUpdate); 

I don't know if it's good or not, so let's analyze 1 first
However, it seems that there are some problems, if it is a day, we should judge that the month and month are 1, and then judge the day.