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POPHP5 MySql and PDO Exception
 

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    <p>I have run into an Exception while using PDO with PHP5.4 and MySql.</p> <p>I have read almost every other post, blog, manual, snippet, everything I can related to this error and have tried everything I have seen with no luck.</p> <p>So I am hoping it is specific to something I have done wrong in my particular code and you can point it out to me.</p> <p>Here is the error:</p> <blockquote> <p>SQLSTATE[HY000]: General error: 2014 Cannot execute queries while other unbuffered queries are active. Consider using PDOStatement::fetchAll(). Alternatively, if your code is only ever going to run against mysql, you may enable query buffering by setting the PDO::MYSQL_ATTR_USE_BUFFERED_QUERY attribute.</p> </blockquote> <p>Here are the parts of code that lead to this error:</p> <p><strong>First Part:</strong></p> <pre><code> $stmt = $this-&gt;dbConn-&gt;prepare("CALL getPopularProducts()"); $stmt-&gt;execute(); $rows = $stmt-&gt;fetchAll(\PDO::FETCH_ASSOC); //$stmt-&gt;closeCursor(); foreach ($rows as $row) { $p = new entity\LightingPole(); /* doing basic set stuff here so code omitted */ // apply category to product $categroyTranslator = new ProductCategoryTranslator(); $categroyTranslator-&gt;applyProductCategory($p); </code></pre> <p><strong>Second part:</strong></p> <pre><code> public function applyProductCategory(entity\Product $product) { $productId = $product-&gt;getProductId(); try { /** exception thrown on this line **/ $stmt = $this-&gt;dbConn-&gt;prepare("CALL getCategoryByProductId(?)"); $stmt-&gt;bindParam(1, $productId, \PDO::PARAM_INT); $stmt-&gt;execute(); while ($row = $stmt-&gt;fetch(\PDO::FETCH_ASSOC)){ $category = new entity\ProductCategory(); $product-&gt;setCategory($category); } } catch (\PDOException $e) { echo $e-&gt;getMessage(); print($e-&gt;getTraceAsString()); } } </code></pre> <p><strong>Here is my database class:</strong></p> <pre><code>namespace lib\database; class Database { protected static $instance; public static function getInstance() { if(self::$instance == null) { $dsn = "mydsn"; $user = "myuser"; $password = "mypassword"; self::$instance-&gt;setAttribute(\PDO::ATTR_EMULATE_PREPARES, false); self::$instance-&gt;setAttribute(\PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, true); self::$instance-&gt;setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION); } return self::$instance; } private function __construct() {} private function __clone() {} } </code></pre> <p>You may notice I have a call to <code>$stmt-&gt;closeCursor()</code> which I have commented out. When I include this line of code I get the following error:</p> <blockquote> <p>SQLSTATE[HY000]: General error: 2006 MySQL server has gone away</p> </blockquote> <p>Now to explain it in plain functionality terms, what I am basically doing here is getting a list of popular products, looping through them and getting all the associated product data such as ProductCategory etc...</p> <p>So this error, happens for the first product in the loop only, i.e. the second time I call <code>applyProductCategory()</code> it works fine, no problem. The other thing is that below <code>applyProductCategory</code> are about 4 more calls to retrieve other types of associated data and there are never any errors thrown while doing that either.</p> <p>So in the end, all my popular products are fine, except the very first product never has a ProductCategory associated with it.</p> <p>Looking forward to finding out what I have missed along the way to cause this. Hopefully you can point me in the right directions.</p>
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    1. COwhy are you escaping `PDO` ?
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    2. CO@Erik, I am not escaping PDO I am using php namespaces and the slash is required so php doesnt look for PDO in my class.
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    3. COCool! You learn something new every day :)
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