ErrorHandler.php
protected static function highlightCode(string $file, int $line, int $padding = 6) : array
    {
        if ( ! is_readable($file)) {
            return false;
        }

        $handle      = fopen($file, 'r');
        $lines       = array();
        $currentLine = 0;

        while ( ! feof($handle)) {
            $currentLine++;

            $temp = fgets($handle);

            if ($currentLine > $line + $padding) {
                break; // Exit loop after we have found what we were looking for
            }

            if ($currentLine >= ($line - $padding) && $currentLine <= ($line + $padding)) {
                $lines[] = array
                (
                    'number'      => str_pad($currentLine, 4, ' ', STR_PAD_LEFT),
                    'highlighted' => ($currentLine === $line),
                    'code'        => ErrorHandler::highlightString($temp),
                );
            }
        }

        fclose($handle);

        return $lines;
    }
protected static function highlightCode(string $file, int $line, int $padding = 6) : array
    {
        if ( ! is_readable($file)) {
            return false;
        }

        $handle      = fopen($file, 'r');
        $lines       = array();
        $currentLine = 0;

        while ( ! feof($handle)) {
            $currentLine++;

            $temp = fgets($handle);

            if ($currentLine > $line + $padding) {
                break; // Exit loop after we have found what we were looking for
            }

            if ($currentLine >= ($line - $padding) && $currentLine <= ($line + $padding)) {
                $lines[] = array
                (
                    'number'      => str_pad($currentLine, 4, ' ', STR_PAD_LEFT),
                    'highlighted' => ($currentLine === $line),
                    'code'        => ErrorHandler::highlightString($temp),
                );
            }
        }

        fclose($handle);

        return $lines;
    }
Returns an array of lines from a file.

@param  string $file    File in which you want to highlight a line
@param  int    $line    Line number to highlight
@param  int    $padding (optional) Number of padding lines
@return array