php数据库问题，求助。。。。
初学PHP来的，想自己写一个登陆的页面，但现在连验证帐号都过不去，请大家看下我的代码是哪里有问题
<?php <br>$user123 = $_POST['user']; <br>$db = new mysqli($sqln,$sqlu,$sqlp,$sqld) or die("Error in the consult.." . mysqli_error($db)); <br>$query = "SELECT 'user_email' FROM 'user' WHERE 'user_email' = '$user123'"; <br>// mysql_select_db($sqld); <br>mysqli_select_db($db, $sqld); <br>$result = $db->query($query) or die("Error in the consult.." . mysqli_error($db)); <br>if ($result == 1){ <br>echo "<p> 登陆成功 </p>"; <br>} <br>elseif ($result == 0){ <br>echo "<p> 没有找到 </p>"; <br>} <br><br>echo $_POST["user"]; <br>$dba = $db->affected_rows; <br>echo $dba; <br>mysqli_close($db); <br>?> $result = $db->query($query) or die("Error in the consult.." . mysqli_error($db));
这句不加后面的错误显示的话后面的 echo $dba 显示的是-1，但是我输入的帐号在数据库里面是有的。
我输入的user123是 vvvvy
但是网页打开来提交后显示这个错误 Error in the consult..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 ''user' WHERE 'user_email' = 'vvvvy'' at line 1
