PHP return 更改 Table 添加主键时出错

Question

10.1.15-MariaDB，PHP5.4

使用的代码：

   $table = 'abc';
   mysql_query("ALTER TABLE `$table` ADD PRIMARY KEY (`col`)");

错误：

You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near \'ALTER TABLE...

我试过 KEY `PRIMARY` 并删除所有反引号都无济于事。

Updates: It has nothing to do with extensions whatsoever, tested with mysqli_ same error. However, repeated test using same script in different server environment is fine.

Answer 1

我试过这段代码，它对我有用

$table = 'abc';

$query="ALTER TABLE `".$table."` ADD PRIMARY KEY(`col`);";

/* Execute query */
$result=$mysqli->query($query);
/* Verify results */
if(!$result) {
  $ErrMessage  =  "Error : " $mysqli->error . "\n";
  $mysqli->close();
  die($ErrMessage);        
}

您是否有权修改 table？

Answer 2

这里是与 mysqli 的快速连接

$mysqli =  new mysqli($db_host, $db_user, $db_pass,$database); 

if (mysqli_connect_errno()) {
  printf("Connect failed: %s\n", mysqli_connect_error());
  die ("<h1>can't use database !</h1>");
exit();
 }
/* change character set to utf8 */
if (!$mysqli->set_charset("utf8")) {
printf("error loding 'character set utf8' : %s\n", $mysqli->error);
}

Answer 3

首先感谢大家的帮助。将脚本复制并粘贴到显示大量错误描述的不同服务器环境后，我得到了答案。

right syntax to use near '\xef\xbb\xbfALTER TABLE abc ADD PRIMARY KEY

恶魔是\xef\xbb\xb

发生这种情况是因为我必须处理多种语言。不过，我确实希望能给我一些建议，让我以后如何避免这些愚蠢的错误。

PHP return 更改 Table 添加主键时出错

PHP return error when Alter Table Add Primary Key

php

mysql

primary-key

mariadb