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POmysql_fetch_array()/mysql_fetch_assoc()/mysql_fetch_row()/mysql_num_rows etc... expects parameter 1 to be resource
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  1. POmysql_fetch_array()/mysql_fetch_assoc()/mysql_fetch_row()/mysql_num_rows etc... expects parameter 1 to be resource
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    copied!<p>I am trying to select data from a MySQL table, but I get one of the following error messages:</p> <blockquote> <p>mysql_fetch_array() expects parameter 1 to be resource, boolean given</p> </blockquote> <p>or</p> <blockquote> <p>mysqli_fetch_array() expects parameter 1 to be mysqli_result, boolean given</p> </blockquote> <p>or</p> <blockquote> <p>Call to a member function fetch_array() on boolean / non-object</p> </blockquote> <p>This is my code:</p> <pre><code>$username = $_POST['username']; $password = $_POST['password']; $result = mysql_query('SELECT * FROM Users WHERE UserName LIKE $username'); while($row = mysql_fetch_array($result)) { echo $row['FirstName']; } </code></pre> <p>The same applies to code like </p> <pre><code>$result = mysqli_query($mysqli, 'SELECT ...'); // mysqli_fetch_array() expects parameter 1 to be mysqli_result, boolean given while( $row=mysqli_fetch_array($result) ) { ... </code></pre> <p>and</p> <pre><code>$result = $mysqli-&gt;query($mysqli, 'SELECT ...'); // Call to a member function fetch_assoc() on a non-object while( $row=$result-&gt;fetch_assoc($result) ) { ... </code></pre> <p>and </p> <pre><code>$result = $pdo-&gt;query('SELECT ...', PDO::FETCH_ASSOC); // Invalid argument supplied for foreach() foreach( $result as $row ) { ... </code></pre> <p>and </p> <pre><code>$stmt = $mysqli-&gt;prepare('SELECT ...'); // Call to a member function bind_param() on a non-object $stmt-&gt;bind_param(...); </code></pre> <p>and</p> <pre><code>$stmt = $pdo-&gt;prepare('SELECT ...'); // Call to a member function bindParam() on a non-object $stmt-&gt;bindParam(...); </code></pre>
 

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