使用PHP插入到MySQL數據庫的某些領域

Question

我無法得到這個編譯正確。

$username = mysql_real_escape_string($_GET['username']); 
$about = mysql_reaL_escape_string($_GET['about']); 
$icebreaker = mysql_reaL_escape_string($_GET['icebreaker']); 


$query = "UPDATE '$mysql_database'.main SET about = '$about', icebreaker = '$icebreaker' WHERE username = '$username';"; 

我得到的錯誤

You have an error in your SQL syntax; check the manual that corresponds 
to your MySQL server version for the right syntax to use near ''a4396957_users'.main 
SET about = 'testing', icebreaker = 'ice' WHERE us' at line 1 

有缺這個說法？

Answer 1

不撇號，其名稱引用數據庫名稱或引用

$query = "UPDATE `$mysql_database`.`main` SET `about` = '$about', `icebreaker` = '$icebreaker' WHERE `username` = '$username';"; 

使用'而不是'

Answer 2

$query = "UPDATE $mysql_database.main SET about = '$about', icebreaker = '$icebreaker' WHERE username = '$username';"; 

內的MySQL某些對象，包括數據庫，表，索引，列，別名，視圖，存儲過程，分區，並且已知作爲標識符的其它對象名稱..

標識符引號字符是反引號（「`」）..

如果啓用了ANSI_QUOTES SQL模式，它也允許雙引號內引用標識符：

mysql> CREATE TABLE "test" (col INT); 
ERROR 1064: You have an error in your SQL syntax... 

mysql> SET sql_mode='ANSI_QUOTES'; 
mysql> CREATE TABLE "test" (col INT); 
Query OK, 0 rows affected (0.00 sec)