Custom way to log the exception in codeigniter - codeigniter

Question

I am trying to build an exception handler for codeIgniter that triggers when an error occurs, and it will record all input that caused the exception and the output the exception gave in a clean neat format in a text file.
As far I could only record the exception in log file using log function. in the error_db template file I extracted the message value and inserted it into log file.
<div id="container">
<h1><?php echo $heading; ?></h1>
<?php echo $message;
$formatted_msg = str_replace('</p>','',$message);
$formatted_msgs = explode('<p>',$formatted_msg);
$messages = $formatted_msgs[1].' --> '.$formatted_msgs[4].' --> '.$formatted_msgs[5];
log_message('error',$messages);
?>
</div>
I want to show the result like: What function,what input and which line caused the exception and output produced. Now I am getting data like
ERROR - 2019-04-16 15:28:40 --> Error Number: 1054 --> Filename: file_path/system/database/DB_driver.php --> Line Number: 691

Answer 1

I followed this method and got the answer. https://stackoverflow.com/a/15860744/11367846
And added some customization for my requirement. In the controller page in exception catch added code for customized log.
public function controller_method( )
{
try
{
// normal flow
}
catch( Exception $e )
{
$trace = $e->getTrace();
$result = 'Exception: "';
$result .= $e->getMessage();
$result .= '" # ';
if($trace[4]['file'] != '') {
$result .= ' File : '.$trace[4]['file'].'::: Line : '.$trace[4]['line'].' ::: Source :'.$trace[5]['class'].' -> '.$trace[5]['function'].' ::: Function : '.$trace[4]['class'].' -> '.$trace[4]['function'].' ::: Inputs :'.http_build_query($trace[4]['args']);
}
log_message( 'error', $result );
}
}