Question

我的PHP功能遇到了一些问题。

我创建了一个PHP函数，在160个字符后扣除1个SMS信用，在320个字符后扣除2个SMS信用等等，但最近我观察到151个字符或少于160个文本扣除2个SMS信用。我不知道是否有任何隐藏的角色，或者我是否没有逃过某些字符串。

以下是PHP代码：

//=== function to deduct credit per sms

function deduct_sms_credit( $user_id, $msg ) {
    $per_sms = 160;

    //calculate the no. Of sms pages with ceil() function
    $no_pg_sms = ceil( strlen( $msg ) / $per_sms );
    $sms_amount = $no_pg_sms;
    $query = "SELECT * FROM sms_history WHERE user_id=".$user_id."";
    $result = mysql_query( $query );
    while( $rs = mysql_fetch_array( $result ) ) {
        $remaining = $rs['remaining'] - $sms_amount;
        $spent = $rs['spent'] + $sms_amount;
    }
    $qupdate = "UPDATE sms_history SET `remaining` = ".$remaining.", `spent` = ".$spent." WHERE user_id = ".$user_id."";
    mysql_query( $qupdate );    
}

我尝试发送包含以下内容的短信：

尊敬的客户，对于登录最后一周时遇到的问题，我们深表歉意，请点击以下链接重置密码http://bit.ly/i5ud1zhm,www.boltsns238.com

它向我收取2个学分而不是一个学分。我需要任何PHP函数的帮助来修剪，转义或解决问题。

Answer 1

我修改了你的功能

function deduct_sms_credit( $user_id, $msg ) {
     $per_sms = 160;
     $no_pg_sms = 0;

     $len = mb_strlen($msg);

     if($len<=160)
     {
        $no_pg_sms = 0;
     }
     else if ($len % $per_sms == 0) {
         $no_pg_sms = $len / $per_sms;
      } else {
          $str_sms = chunk_split($msg,160,"|*|");
          $arr_sms = explode("|*|", $str_sms);
          foreach($arr_sms as $key=>$value)
          {
             if(mb_strlen($value) !== 0)
                 $no_pg_sms++;
          }
    }

    $sms_amount = $no_pg_sms;
    $query = "SELECT * FROM sms_history WHERE user_id=".$user_id."";
    $result = mysql_query( $query );
    while( $rs = mysql_fetch_array( $result ) ) {
      $remaining = $rs['remaining'] - $sms_amount;
      $spent = $rs['spent'] + $sms_amount;
  }
  $qupdate = "UPDATE sms_history SET `remaining` = ".$remaining.", `spent` = ".$spent."   WHERE user_id = ".$user_id."";
  mysql_query( $qupdate );    
  }

请尝试这个并告诉我

Answer 2

也许你应该尝试使用函数mb_strlen

http://ca3.php.net/manual/en/function.mb-strlen.php

可能的问题是你传递的是$ msg，这是一个unicode字符串或其他一些多字节编码（例如utf-8）。在这种情况下，strlen将为每1个字符返回2个甚至更多，从而使你的strlen膨胀。

//=== function to deduct credit per sms

function deduct_sms_credit( $user_id, $msg ) {
    $per_sms = 160;

    //calculate the no. Of sms pages with ceil() function
    $no_pg_sms = ceil( mb_strlen( $msg ) / $per_sms );
    $sms_amount = $no_pg_sms;
    $query = "SELECT * FROM sms_history WHERE user_id=".$user_id."";
    $result = mysql_query( $query );
    while( $rs = mysql_fetch_array( $result ) ) {
        $remaining = $rs['remaining'] - $sms_amount;
        $spent = $rs['spent'] + $sms_amount;
    }
    $qupdate = "UPDATE sms_history SET `remaining` = ".$remaining.", `spent` = ".$spent." WHERE user_id = ".$user_id."";
    mysql_query( $qupdate );    
}

php脚本在160个字符后扣除1个积分

2 个答案: