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////////////// ERROR HANDLING
define('LOG_FULL_PATH', 'D:/output/logging/php/nubuilder_kernel/myRollingLog.htm' );
ini_set('error_log', LOG_FULL_PATH);
ini_set('log_errors', 'On');
// turn off logging to browser
ini_set('display_errors', 'Off');
include ('..\\log4php\\Logger.php');

Logger::configure ( 'config.xml' );
$log = Logger::getLogger('main');

function shutdown_function( ) {
    global $log;
    $error = error_get_last();
    if( is_object( $log )){
    	if( is_object( $error) ){
	    $log->error( "shutdown function called, error message: " . $error->getMessage() );
    	}
    	else {
            $error_type = gettype( $error );
            if( is_array( $error )){
                $error_details = print_r( $error, true );
                $log->error( "shutdown function called, error details: $error_details" ) ;
            }
            else {
                $log->info( "shutdown function called, seemingly no error" );
            }
    	}
    }
}
register_shutdown_function('shutdown_function');

// default (non-fatal) error handling...
function error_handler($err_no, $err_str, $err_file, $err_line) {
    global $log;
    if( is_object( $log )){
        $log->error( "error_handler called: $err_str, $err_file, $err_line");
    }
}
set_error_handler('error_handler');
// default exception handling...
function exception_handler($e) {
    global $log;
    if( is_object( $log )){
        $log->error( "exception_handler called: $e");
    }
}
set_exception_handler('exception_handler');

Code: Select all

// NB this is a flag
common_js_error = false;

// generic error-handler: logs to server and if applicable displays in console
onerror = function(err_msg, url, line_number) {
    var output = 'JS error thrown, url: ' + url + ', line number: ' + line_number + '<br>message: ' + err_msg;
    if ( typeof (console ) != 'undefined') {
        console.error( output);
    }
    if ( typeof (log_to_server ) != 'undefined') {
        // if implemented, this function obviously uses an Ajax call to a php file, which logs the problem (unified PHP and JS log...)
        log_to_server(output, 3); // 2nd field when equal to "3" might signal an error condition
    }
    // NB set flag - up to you whether you clear it and how you use it
    common_js_error = true;
    // returning true or false does not cause the previously defined onerror to be called 
    // however it is stated that returning true "prevents the firing of the default event handler"
    return true;
};