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POConverting PHP query to PDO query
 

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    <p>I have some php that is receiving a variable from jquery and querying the DB. I recently learned that I need to use PDO to prevent SQL Injections and such so I have been trying to convert my query to it. I am new at php anyway so this is turning out to be more difficult than I thought (even though all the articles I read looked quite straightforward)...The DB connection is working and <code>'name'</code> is receiving the right value but it is not updating the page like it used to. I am guessing it has to do with my loop that contains the <code>json_encode</code>. Below is my old php and then my attempt at turning it into PDO format.</p> <p>Old PHP:</p> <pre><code>$dbstylename = $_POST['name']; $result = mysql_query("SELECT * FROM style where stylename like '$dbstylename'"); $array = mysql_fetch_row($result); echo json_encode($array); mysql_close($con); ?&gt; </code></pre> <p>New PDO attempt:</p> <pre><code>&lt;?php include 'db.php'; try { $dbConnection = new PDO('mysql:host=$dbhost;dbname=$dbhost;', $user, $pass); $dbConnection-&gt;setAttribute(PDO::ATTR_EMULATE_PREPARES, false); $dbConnection-&gt;setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); #Prepare the query $dbstylename = $_POST['name']; $result = $dbConnection-&gt;prepare('SELECT * FROM style where stylename like :dbstylename'); #bind $result-&gt;bindParam(':dbstylename', $dbstylename, PDO::PARAM_STR); #execute if ($result-&gt;execute(array($dbstylename))) { while ($row = $result-&gt;fetch()) { json_encode($row); } } } catch(PDOException $e) { echo 'ERROR: ' . $e-&gt;getMessage(); } ?&gt; </code></pre> <p>================UPDATE==============================</p> <p>In addition to @MadaraUchiha great answer and follow up help I had to change my jQuery from this (which worked before PDO):</p> <pre><code>$.ajax({ url: '../test.php', type: 'POST', data: {'name' : target}, dataType: 'json', success: function(data) { var styleid = data[0]; var stylename = data[1]; var stylecss = data[2]; $('#codeTest').html("&lt;b&gt;id: &lt;/b&gt;&lt;br /&gt;"+styleid+"&lt;br /&gt;&lt;b&gt; stylename: &lt;/b&gt;&lt;br /&gt;"+stylename+"&lt;br /&gt;&lt;b&gt; stylecss: &lt;/b&gt;&lt;br /&gt;"+stylecss); } }); </code></pre> <p>To this:</p> <pre><code>$.ajax({ url: '../test.php', type: 'POST', data: {'name' : target}, dataType: 'json', success: function(data) { var styleid = data.styleid; var stylename = data.stylename; var stylecss = data.stylecss; $('#codeTest').html("&lt;b&gt;id: &lt;/b&gt;&lt;br /&gt;"+styleid+"&lt;br /&gt;&lt;b&gt; stylename: &lt;/b&gt;&lt;br /&gt;"+stylename+"&lt;br /&gt;&lt;b&gt; stylecss: &lt;/b&gt;&lt;br /&gt;"+stylecss); } }); </code></pre>
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    1. COand what is the problem?
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    2. COYour PDO version is not `echo`ing the encoded result. (Though if you want to only echo one row, you don't need the `while` loop.)
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    3. CO@Ibu I think it is querying fine but I don't think I am bring back the results correctly so that the jQuery can update the page..does that make sense? =\
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