感觉是正确的语句不知那里出了有关问题,得不到结果。

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Release: 2016-06-13 13:39:15
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感觉是正确的语句不知那里出了问题,得不到结果。。。求助

PHP code
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-->$flag=mysql_query("insert into tb_leaveword(userid,createtime,title,content) values('$userid','$createtime','$title','$content')",$conn);
echo "$flag";
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调试过程中,不知道为什么,echo打不出来返回值。mysql数据库连接是正常的,后面每个变量也都可以用echo打出来。数据也没写到数据库里面,到底出了什么问题呢?


------解决方案--------------------
PHP code

$sql="insert into tb_leaveword(userid,createtime,title,content) values('$userid','$createtime','$title','$content')";
echo "sql-->>$sql<br>";
$flag=mysql_query($sql,$conn);
$num = mysql_affected_rows();  //执行sql所影响的行数
echo "num-->>$num<br>";
if($num > 0){
  echo "执行成功";
  while($rows = mysql_fetch_array($flag)){……}
}else{
  echo "执行失败";
}
<br><font color="#e78608">------解决方案--------------------</font><br>
mysql_query("insert into tb_leaveword(userid,createtime,title,content) values('$userid','$createtime','$title','$content')",$conn) or die(mysql_error());<br><br>echo "$flag"; 没有东西就表示你的 SQL 语句有问题了<br><br>mysql_query 在执行非 select 指令时,只返回逻辑值。false 用 echo 只能是没有内容<br>要 var_dump($flag); 才行
<br><font color="#e78608">------解决方案--------------------</font><br>语法问题排除,但其它原因就没法给你排除,你需要贴出mysql_error()才能知道 <div class="clear">
                 
              
              
        
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