How to catch all PHP errors in CodeIgniter Framework

[lilmer]

The problem is that I've already implemented procedures that has no try-and-catch exceptions.

Is there any procedure or functions that I can catch all PHP errors occurs in every page Globally?

 

[requinix]

set_error_handler

 

Not quite the same thing but it will let you catch most errors. Not the very fatal ones, though.

[sKunKbad]

I've actually been using set_error_handler in a pre_system hook with CodeIgniter. If on development machine I just see the errors, however if on production the errors are logged to a file, then once every 15 minutes the file is emailed to me.

 

Don't be tempted to email yourself with each error as it happens. I learned the hard way that if PHP loops through an array where a notice is generated it will send you as many emails as notices. I got 4000 emails one day!

<?php

function my_error_handler( $e_number, $e_message, $e_file, $e_line, $e_vars )
{
	// Debugging allows dev to log errors like production
	$debug = FALSE;

	// The amount of E_NOTICE + E_STRICT before we die()
	$error_limit = 25;

	// The number of errors counted on this request
	static $error_count = 1;

	// Set the text of type of error displayed
	switch( $e_number )
	{
		case E_USER_ERROR:
			$error_type = 'E_USER_ERROR';
			break;

		case E_USER_WARNING:
			$error_type = 'E_USER_WARNING';
			break;

		case E_USER_NOTICE:
			$error_type = 'E_USER_NOTICE';
			break;
		
		case E_WARNING:
			$error_type = 'E_WARNING';
			break;

		case E_NOTICE:
			$error_type = 'E_NOTICE';
			break;

		case E_STRICT:
			$error_type = 'E_STRICT';
			break;

		default:
			$error_type = 'UNKNOWN ERROR TYPE';
			break;
	}

	// Output for development or testing environments (unless debug === TRUE)
	if( ENVIRONMENT != 'production' && $debug !== TRUE )
	{
		echo '<hr />PHP ' . $error_type . ' #' . $e_number . ' - Date/Time: ' . date('n/j/Y H:i:s') . PHP_EOL .
			'<br />File: <b>' . $e_file . '</b>' . PHP_EOL . 
			'<br />Line: <b>' . $e_line . '</b>' . PHP_EOL . 
			'<br /><b>' . $e_message . '</b><hr />' . PHP_EOL;
	}

	// Log file for production environment
	else
	{
		// MAIN MESSAGE
		$message = '#---' . PHP_EOL . 
			'PHP ' . $error_type . ' #' . $e_number . ' - Date/Time: ' . date('n/j/Y H:i:s') . PHP_EOL .
			'File: ' . $e_file . PHP_EOL .
			'Line: ' . $e_line . PHP_EOL .
			'Message: ' . $e_message . PHP_EOL;

		// POST VARS
		if( isset( $_POST ) && ! empty( $_POST ) )
		{
			$message .= 'POST vars:' . PHP_EOL;

			foreach( $_POST as $k => $v )
			{
				$message .= '\t' . $k . ' = ' . $v . PHP_EOL;
			}
		}

		// REQUEST HEADERS
		if( $request_headers = apache_request_headers() )
		{
			$message .= 'Request headers:' . PHP_EOL;

			foreach( $request_headers as $k => $v )
			{
				$message .= '\t' . $k . ' = ' . $v . PHP_EOL;
			}
		}

		// REQUEST URI
		$message .= 'Request URI: ' . $_SERVER['REQUEST_URI'] . PHP_EOL;

		// ERROR COUNT
		$message .= 'Error Count: ' . $error_count . PHP_EOL;

		$message .= '#--' . PHP_EOL;

		// Second param (3) says to store error in specified log file
		error_log($message, 3, FCPATH . '/application/logs/php_errors/php_errors.log' );

		// If not an E_NOTICE or E_STRICT, die()
		if( $e_number != E_NOTICE && $e_number < E_STRICT )
		{
			die( '<br /><br /><span style="color:red;">A system error occurred. We apologize for the inconvenience.</span>');
		}

		// If too many E_NOTICE or E_STRICT, die()
		$error_count++;
		if( $error_count > $error_limit )
		{
			die( '<br /><br /><span style="color:red;">A system error occurred. We apologize for the inconvenience.</span><br /><span style="font-size:50%;">E_NOTICE + E_STRICT > ' . $error_limit . '</span>');
		}
	}

	// Don't execute PHP internal error handler
	return TRUE;
}

function my_error_handling()
{
	set_error_handler('my_error_handler', E_ALL);
}

Edited July 7, 2015 by sKunKbad

[requinix]

Don't be tempted to email yourself with each error as it happens. I learned the hard way that if PHP loops through an array where a notice is generated it will send you as many emails as notices. I got 4000 emails one day!

ignore_repeated_errors can help with that.

 

Another trick is to use Linux's logrotate: it can keep individual error files small by rotating them: error.log becomes error.log.1 becomes error.log.1.gz and so on. You can have it email you the error file at the same time.

[scootstah]

set_error_handler

 

Not quite the same thing but it will let you catch most errors. Not the very fatal ones, though.

You can use register_shutdown_function to capture (most) fatal errors.

[lilmer]

Thank you for your response, 

 

I set it using codeigniter hooks, using PHP set_error_handler, register_shutdown_function for fatal erros.