Commonly used small program code snippets in PHP_php tips

The examples in this article describe commonly used small program code segments in PHP. Share it with everyone for your reference, the details are as follows:

1. Calculate the difference in days between two times

$startdate=strtotime("2009-12-09");
$enddate=strtotime("2009-12-05");

The above PHP time and date function strtotime has turned the string date into a timestamp. In this way, you only need to subtract the two values ​​​​and then turn the seconds into days. The comparison is simple, as follows:

$days=round(($enddate-$startdate)/3600/24) ;
echo $days; //days为得到的天数;

2. Pagination

/**
* author jackluo
* $url 地址，$count 总数，$page 当前面,$Pagesize 分页大小
*/ 
function page_paper($url,$count,$page,$pagesize){
  $allpage = ceil($count/$pagesize);
  if($allpage<=3){
   for($i=1;$i<=$allpage;$i++){
    if($i==$page){
     echo '<a href="'.$url.'&page='.$page.'" class="page_ovr">'.$i.'</a>';
    }else{
     echo '<a href="'.$url.'&page='.$i.'" >'.$i.'</a>';
    }
   }
  }else{
   $currentpage =  $allpage-$page;
   if($page<=3){
    for($i=1;$i<=$page;$i++){
     if($i == $page){
      echo '<a href="'.$url.'&page='.$i.'" class="page_ovr">'.$i.'</a>';
     }else{
      echo '<a href="'.$url.'&page='.$i.'" >'.$i.'</a>';
     }
    }
    //后三条
    if($currentpage<=3){
     for($i=($page+1);$i<=$allpage;$i++){
      echo '<a href="'.$url.'&page='.$i.'" >'.$i.'</a>';
     }
    }else{
     for($i=($page+1);$i<=($page+3);$i++){
      echo '<a href="'.$url.'&page='.$i.'" >'.$i.'</a>';
     }
    }
   }else{
    //前三条
    for($i=($page-3);$i<=$page;$i++){
     if($i == $page){
      echo '<a href="'.$url.'&page='.$i.'" class="page_ovr">'.$i.'</a>';
     }else{
      echo '<a href="'.$url.'&page='.$i.'" >'.$i.'</a>';
     }
    }
    if($currentpage<=3){
     for($i=($page+1);$i<=$allpage;$i++){
      echo '<a href="'.$url.'&page='.$i.'" >'.$i.'</a>';
     }
    }else{
     //后三条
     for($i=($page+1);$i<=($page+3);$i++){
       echo '<a href="'.$url.'&page='.$i.'" >'.$i.'</a>';
     }
    }
   }
  }
}

3. Get the location of the mobile phone (if you have time, you can write a mobile platform)

//获得手机归属地
function phonenumberinfo($phone){
  $list = array();
  $soap =  new SoapClient('http://webservice.webxml.com.cn/WebServices/MobileCodeWS.asmx?wsdl');
  $result =(array) $soap->getMobileCodeInfo(array(
    'mobileCode'=>$phone
  ));
  list($moblie,$location,$lbs) = explode(' ', $result['getMobileCodeInfoResult']);
  if($lbs){
   $type =  array('移动','电信','联通');
   foreach($type as $key=>$value){
    $ps = strpos($lbs, $value);
    if($ps){
     $procver = substr($lbs, 0,$ps);
     $list['province'] = $procver;
     $list['operator'] = $value;
     $list['city'] = $location;
     $list['type'] = $key;
     break;
    }
   }
   return $list;
  }
}

I hope this article will be helpful to everyone in PHP programming.