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POUnable to run query: ?? No query error message leads me nowhere
 

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  1. POUnable to run query: ?? No query error message leads me nowhere
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    <p>SO I have this authentication code. Everything else works except when I input a wrong user name. It just keeps showing in the page: "Unable to run query:" &lt;-- Only this. I don't know what's wrong. Please do help.</p> <p>Here's my code for that part:</p> <pre><code>if($UserN){ if($UserP){ require("connect.php"); $query = mysql_query("SELECT * FROM customer WHERE UserName = '$UserN'"); $numrows = mysql_num_rows($query) or die ('Unable to run query:'.mysql_error()); if($numrows == 1){ $row = mysql_fetch_assoc($query)or die ('Unable to run query:'.mysql_error()); // fetch associated: get function from a query for a database $dbpass = $row['PassWord']; // read password of inputted user from the query. $dbuser = $row['UserName']; // read username from the query $dbactive = $row['Active']; // read if user is active $dbid = $row['CustNum']; if($UserP == $dbpass){ if($dbactive == 1){ //set session information $_SESSION['CustNum'] = $dbid; $_SESSION['UserName'] = $dbuser; echo "&lt;br&gt;&lt;br&gt;&lt;center&gt;&lt;b&gt;You have been logged in as &lt;b&gt;$dbuser&lt;/b&gt;. &lt;a href='orderform.php'&gt;Click here&lt;/a&gt; to go to the member page.&lt;/b&gt;&lt;/center&gt;&lt;br&gt;&lt;br&gt;"; } else echo "$form &lt;center&gt;&lt;b&gt;You need to activate your account.&lt;/b&gt;&lt;/center&gt;&lt;/br&gt;"; } else echo "$form &lt;center&gt;&lt;b&gt;You did not enter a correct password.&lt;/b&gt;&lt;/center&gt; &lt;/br&gt;"; } else echo "$form &lt;center&gt;&lt;b&gt;The username you entered was not found.&lt;/b&gt;&lt;/center&gt;&lt;/br&gt; "; mysql_close(); } else echo "$form &lt;center&gt;&lt;b&gt;You must enter your password. &lt;/b&gt;&lt;/center&gt;&lt;/br&gt;"; } else echo "$form &lt;center&gt;&lt;b&gt;You must enter your username. &lt;/b&gt;&lt;/center&gt;&lt;/br&gt;"; </code></pre>
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    1. USuser1717305
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      1. POUnable to run query: ?? No query error message leads me nowhere
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      1. VTUpMod
    1. COYour code is vulnerable to SQL injection here: `mysql_query("SELECT * FROM customer WHERE UserName = '$UserN'");`
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      1. USJSK NS
    2. COBetter hope Little Bobby Tables never tries to log in.
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      1. USPaul Tomblin
    3. COThis is **extremely** unsafe and should not be exposed to the general public. An [automatic SQL vulnerability testing tool](http://sqlmap.org/) would have a field day with this. It's only a matter of time until you're hacked if you have code like this.
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      1. UStadman
 

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