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POMysqli Prepared Statement problem
 

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  1. POMysqli Prepared Statement problem
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    <p>i use MYSQLI Extension with prepared statements, what im doing is video encoding, the encoding works, but i have trouble with MYSQL</p> <p>When the code reaches i get 2 errors ONE is</p> <pre><code>PHP Fatal error: Call to a member function bind_param() on a non-object in /site.com/processor.php on line 108 </code></pre> <p>HERE the SQL</p> <pre><code> $sql = "UPDATE videos_to_edit SET status = 'finished' WHERE post_id = ?"; $stmt = $mysqli-&gt;prepare($sql); $stmt-&gt;bind_param('i', $id); $stmt-&gt;execute(); $stmt-&gt;close(); </code></pre> <p>and when I <code>var_dump($stmt)</code> it shows bool false. I noticed also, when i encode a other video it works but sometimes it dont works. (always the mysql error) When I comment out this line</p> <pre><code> exec("$mencoder $temp_upload_dir$post_filename -o $temp_upload_dir$r_post_id.mp4 2&gt;&amp;1", $output); </code></pre> <p>than MYSQLI works, but i need this line to encode my video. Any Ideas what i doing wrong?</p> <pre><code>set_time_limit(0); if(!file_exists($pcp ."processor1")) { $sql = "SELECT post_id, filename, status FROM videos_to_edit WHERE status = 'pending' ORDER BY post_id ASC LIMIT 1"; $stmt = $mysqli-&gt;prepare($sql); $stmt-&gt;execute(); $stmt-&gt;bind_result($r_post_id, $post_filename, $status); $stmt-&gt;store_result(); $checker = $stmt-&gt;num_rows; $stmt-&gt;fetch(); $stmt-&gt;close(); $id = $r_post_id; //$video = null; if($checker &gt;= 1 &amp;&amp; $status != "encoding" &amp;&amp; $status != "finished" &amp;&amp; $status != "removed" ) { $sql = "UPDATE videos_to_edit SET status = 'encoding' WHERE post_id = ?"; $stmt = $mysqli-&gt;prepare($sql); $stmt-&gt;bind_param('i', $r_post_id); $stmt-&gt;execute(); $stmt-&gt;close(); $ourFileName = $pcp ."processor1"; $ourFileHandle = fopen($ourFileName, 'w') or die("can't open file"); fclose($ourFileHandle); exec("$mencoder $temp_upload_dir$post_filename -o $temp_upload_dir$r_post_id.mp4 2&gt;&amp;1", $output); foreach($output as $error) { if(preg_match('/============ Sorry, this file format is not recognized\/supported =============/', $error)) { $error1 = "error"; break; } } if(!isset($error1)) { exec("$mp4box $temp_upload_dir$r_post_id.mp4"); exec("$mplayer $temp_upload_dir$r_post_id.mp4 2&gt;&amp;1", $video); foreach($video as $vidlenght) { if(preg_match('/ID_LENGTH=/', $vidlenght)) { $duration = $vidlenght; $duration = explode("=",$duration); $duration = round($duration['1']); break; } } $hms = sec2hms($duration); mkdir("$temp_upload_dir$r_post_id", 0700); $duration1 = round($duration / 15); for($b = 1; $b &lt;= 15; $b++) { $time = $b * $duration1; exec("$ffmpeg -ss $time -i $temp_upload_dir$r_post_id.mp4 -r 1 -vframes 15 -y -s 190x143 -f image2 $temp_upload_dir/$r_post_id/$r_post_id-$b.jpg 2&gt;&amp;1", $mplayer); } $sql = "UPDATE videos_to_edit SET status = 'finished' WHERE post_id = ?"; $stmt = $mysqli-&gt;prepare($sql); $stmt-&gt;bind_param('i', $id); $stmt-&gt;execute(); $stmt-&gt;close(); $sql = "INSERT INTO post_lenght (post_id, post_length, seconds) VALUES (?, ?, ?)"; $stmt = $mysqli-&gt;prepare($sql); $stmt-&gt;bind_param('iss', $r_post_id, $hms, $duration); $stmt-&gt;execute(); $stmt-&gt;close(); $thumbdir1 = $temp_upload_dir . $r_post_id; $thumbdest = $thumbdir.$r_post_id; $videotempdir = $temp_upload_dir . $r_post_id . ".mp4"; $videodes = $videodir . $r_post_id . ".mp4"; $videotempdirsrc = $temp_upload_dir . $post_filename; $videodessrc = $temp_upload_dir . "src/" . $post_filename; full_copy($thumbdir1, $thumbdest); rename($videotempdir, $videodes ); rename($videotempdirsrc, $videodessrc); recursiveDelete($thumbdir1); unlink($pcp ."processor1"); unset($video); unset($hms); unset($vidlenght); unset($duration); } else { $sql = "UPDATE videos_to_edit SET status = 'error' WHERE post_id = ?"; $stmt = $mysqli-&gt;prepare($sql); $stmt-&gt;bind_param('i', $r_post_id); $stmt-&gt;execute(); $stmt-&gt;close(); unlink($pcp ."processor1"); } } exit; } </code></pre> <p>Solution: i had this variables in <code>my.cnf</code> set on</p> <pre><code>wait_timeout = 30 interactive_timeout = 60 </code></pre> <p>i changed them into </p> <pre><code>wait_timeout = 3600 interactive_timeout = 3600 </code></pre> <p>and it works, i will google some if i can change these variables in the script, if yes i will do it so, cause i remember the high numbers caused by me RAM problems.</p>
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    1. COyou can use is_readable instead of opening and closing
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    2. COcheck return value of prepare call to see if it succeeded. http://php.net/manual/en/mysqli.prepare.php see http://php.net/manual/en/mysqli.error.php too
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    3. COhow does that help my problem? Sorry i dont get it
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