php - 需要帮助来防止sql注入(inject)

Question

嗨，我有以下声明

function count_rows($table_name, $condition = null, $debug = false)
{
    $query_result = $this->query("SELECT count(*) AS count_rows FROM " . $this->db_prefix . $table_name . " " . $condition, $debug);
    $count_rows = $this->sql_result($query_result, 0, 'count_rows');

    return $count_rows;
}

我一直在使用 firefox 的 sql Inject me 插件，它给了我错误

运行脚本时发生 Mysql 错误:

The query you are trying to run is invalid
Mysql Error Output: 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 '))' at line 2
SQL Query: SELECT count(*) AS count_rows FROM database_auctions a WHERE a.active=1 AND a.approved=1 AND a.deleted=0 AND a.list_in!='store' AND a.catfeat='1' AND a.closed=0 AND (a.category_id IN ())

如何清理此查询以防止 SQL 注入(inject)？

Answer 1

看起来当您传递 $contidion 时，您忘记了括号之间的 a.category_id IN () 应该是值。 为了避免 SQL 注入(inject)检查 this