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POmysqli_num_rows = 0 when it should be 1
 

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  1. POmysqli_num_rows = 0 when it should be 1
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    <p>I've been trying to resolve this problem on my own and for the life of me can't fix it..</p> <pre><code>//If they are, retreive them from the Person table var_dump($_POST['username']); var_dump($_POST['password']); $select = $this-&gt; doQuery("SELECT * FROM Person WHERE username = '{$_POST['username']}' AND password = '".md5($_POST['password'])."'"); var_dump($select); try { if (mysqli_num_rows($select) &gt; 0){ var_dump(mysqli_num_rows($select)); //fetching username and password from database $fetch_array = mysqli_fetch_assoc($select); var_dump($fetch_array); //Building a session for the user $_SESSION['username'] = $fetch_array['username']; //var_dump($_SESSION['username']); //Redirecting the user to the index page header('Location:index.php'); return true; } </code></pre> <p>The two var_dumps on the username and password on the 4th and 5th lines returned this: </p> <pre><code>string(8) "johnny03" string(9) "password3" object(mysqli_result)#3 (5) { ["current_field"]=&gt; int(0) ["field_count"]=&gt; int(8) ["lengths"]=&gt; NULL ["num_rows"]=&gt; int(0) ["type"]=&gt; int(0) } </code></pre> <p>The values that I entered for both the password and username are both valid (they are in the database under the correct columns, trust me). I have a feeling that something is wrong with my select query because the var dump on mysqli_num_rows($select) doesn't return anything.That being said, I've tried just about every change to the query that I could think of to make it work and still nothing :[ Can anyone help? </p>
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    1. USJoanne DeBiasa
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    1. COIs the username pre- and suffixed by a brace ? That's not a typo ?
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    2. COAnd does `var_dump(md5($_POST['password']));` yield the same password that is in the database in the password column? Also you are vulnerable to sql-injection in that query.
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    3. CO+1 to @drew10. If you are sure the username is correct, the encryption of the password in the database has to be verified
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