使用PHP验证SQL查询 [英] Validating SQL query with PHP

问题描述

验证似乎由于某种原因而失败。通过验证，我的意思是 if（$ result）部分。如何正确验证SQL查询？

The validation seems to fail for some reason. By the validation, I mean the "if ($result)" -part. How can I correctly validate SQL-query?

$dbconn = pg_connect("host=localhost port=5432 dbname=heoa user=heoa password=123");
$email  = $_POST['login']['email'];

$result = pg_query_params( $dbconn,
                'SELECT user_id
                FROM users
                WHERE email = $1',
                array( $email )
                );
if ($result)
{
        while ( $row = pg_fetch_array( $result ) )
        {
                $user_id = $row['user_id'];
        }
        return $user_id;
}

推荐答案

我怀疑返回值是整数零，在if语句中也解释为false。通过执行 if（$ result！== FALSE）（请注意，应该为！==和 not ！=），您将验证结果是否确实是与FALSE不同，而不仅仅是假...

I suspect that the return value is integer zero which is also interprested as false in the if statement. By doing "if ($result !== FALSE)" (Note that it should be !== and not !=) you'll verify if the result really is different than FALSEand not just false...

这篇关于使用PHP验证SQL查询的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！