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    <p>EDIT: after discussing <a href="https://stackoverflow.com/questions/8630152/php-eval-is-this-exploitable-in-my-code">here click here</a> i decided to use Francis Avila solution, it is securer, but I didn't find a way to exploit my way, only everybody says its security risk to use eval(). If you find a way, to exploit my away, please post a comment. :-), so that i understand it and also another users, who use eval :-)</p> <p>One positive thing, also is in Francis Avila solution is, you need only specific only 2 vars, $SQL + $INPUT, no need more brother with $output.</p> <p>I found a solution: Overview: i used the function eval();</p> <p>1.Step </p> <pre><code>$sql = "SELECT 1, 2, 3 FROM x WHERE b = ? LIMIT 10"; // SQL STATEMENT $input = array("10"); // b = ? from SQL STATEMENT $output = 3; // Number of variables need for 1, 2, 3 </code></pre> <p>2.Step</p> <pre><code>$data = readDB2($sql, $input, $output); var_dump($data); public function readDB2($sql, $input, $output1) { $stmt = $this-&gt;mysqli-&gt;prepare($sql); if(!empty($input) &amp;&amp; is_array($input)) { $sp = ""; $data = ""; $inputn = count($input) - 1; for($i = 0; $i &lt;= $inputn; $i++) { if($i !== $inputn) { $data .= '$input[' . $i . "],"; } else { $data .= '$input[' . $i . "]"; } $sp .= "s"; } $bind = '$stmt-&gt;bind_param(\''. $sp . '\',' . $data . ');'; eval("return $bind"); } if (!$stmt) {throw new Exception($this-&gt;mysqli-&gt;error);} $stmt-&gt;execute(); if (!$stmt) {throw new Exception($this-&gt;mysqli-&gt;error);} $stmt-&gt;store_result(); $checker = $stmt-&gt;num_rows; if($checker !== 0) { if(!empty($output1)) { $out = ""; for($i = 1; $i &lt;= $output1; $i++) { if($i !== $output1) { $out .= '$out' . $i . ","; } else { $out .= '$out' . $i; } } $res = '$stmt-&gt;bind_result(' . $out . ');'; eval("return $res"); $vars = "array(" . $out . ");"; while ($stmt-&gt;fetch()) { $results[] = eval("return $vars"); } } } else { $results = "NO RESULTS"; } $stmt-&gt;fetch(); $stmt-&gt;close(); $this-&gt;results = array('num_rows' =&gt; $checker, $results); return $this-&gt;results; } </code></pre>
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