Trace errors into a file

[Moatilliatta]

I've been into a requirement from my job, and I think this works well and I suppose that are other colleagues that would use this functions so they save all the error data related to MySQLi so here is my contribution to this excellent library

methods:

Main functions to generate the error from querys:

Properties:
//Boolean variable to set the errorTrack method
protected $errTrack = false;
//String variable to set the route where the file will be created
protected $routeTrack;
//String variable to set the catched error
protected $errMsg = '';

Function that help us to populate our file with all the data recolected from errorTrack function

/**
* Internal function to create a .txt file to save all the log
* collected from an specific query
* @param [type] $data Data that is going to be written in the file
*/

private function createLog($data){ 

    $actual = getcwd();

    $file = $this->routeTrack."mysqli_errors.txt";

    $fh = fopen($file, 'a') or die("Can't open/create file");
    fwrite($fh,$data);
    fclose($fh);

}

/**
* Save errors into a file
* @param bool $enabled Allow create file to save errors
* @param string $route Set a route to create this file
*/

public function setErrTrack($enabled,$route=""){
    $this->errTrack = $enabled;

    // "/var/www/html/inc/libs/";
    $this->routeTrack = $route;
}

/**
* Reset states after an execution
*
* @return object Returns the current instance.
*/

protected function reset()
{
    if ($this->traceEnabled)
        $this->trace[] = array ($this->_lastQuery, (microtime(true) - $this->traceStartQ) , $this->_traceGetCaller());

    //Added some code to this method
    if($this->errTrack && $this->_mysqli->error != NULL){

        //Put the MySQLi errno in order to complement the error info
        $this->errMsg = date("Y-m-d h:i:s ").'MySQLi errno: '.
                    $this->_mysqli->errno.' - '.
                    $this->_mysqli->error." \nQuery: ".
                    $this->_lastQuery."\n\n";

        $this->createLog($this->errMsg);

    }

...

}

Example of use

/**
* Execute sql sentence with parameters
* @param string $sql SQL sentence
* @param array $params All parameters necessary for the query
*
* @return int Result
* */

public static function execute($sql,$params){

    //Set the errorTrack method
    self::getInstance()->setErrTrack(true);

    //Execute Query
    $result = self::getInstance()->rawQuery($sql, $params);     

    //Return result
    return $result;        
}

This methods and properties have been tested with INSERT,UPDATE,DELETE sentences working OK.

[pollux]

I think it's nice that you think about that, but logging is something for a new class.
You're still able to get errors/information with the following methods to log them outside of the database
class:

getLastErrno() getLastError() getLastQuery()