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    <h3>Editing: WtfCommand.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

/*
 * This file is part of Psy Shell.
 *
 * (c) 2012-2023 Justin Hileman
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Psy\Command;

use Psy\Context;
use Psy\ContextAware;
use Psy\Input\FilterOptions;
use Psy\Output\ShellOutput;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;

/**
 * Show the last uncaught exception.
 */
class WtfCommand extends TraceCommand implements ContextAware
{
    /**
     * Context instance (for ContextAware interface).
     *
     * @var Context
     */
    protected $context;

    /**
     * ContextAware interface.
     *
     * @param Context $context
     */
    public function setContext(Context $context)
    {
        $this-&gt;context = $context;
    }

    /**
     * {@inheritdoc}
     */
    protected function configure()
    {
        list($grep, $insensitive, $invert) = FilterOptions::getOptions();

        $this
            -&gt;setName('wtf')
            -&gt;setAliases(['last-exception', 'wtf?'])
            -&gt;setDefinition([
                new InputArgument('incredulity', InputArgument::OPTIONAL | InputArgument::IS_ARRAY, 'Number of lines to show.'),
                new InputOption('all', 'a', InputOption::VALUE_NONE, 'Show entire backtrace.'),

                $grep,
                $insensitive,
                $invert,
            ])
            -&gt;setDescription('Show the backtrace of the most recent exception.')
            -&gt;setHelp(
                &lt;&lt;&lt;'HELP'
Shows a few lines of the backtrace of the most recent exception.

If you want to see more lines, add more question marks or exclamation marks:

e.g.
&lt;return&gt;&gt;&gt;&gt; wtf ?&lt;/return&gt;
&lt;return&gt;&gt;&gt;&gt; wtf ?!???!?!?&lt;/return&gt;

To see the entire backtrace, pass the -a/--all flag:

e.g.
&lt;return&gt;&gt;&gt;&gt; wtf -a&lt;/return&gt;
HELP
            );
    }

    /**
     * {@inheritdoc}
     *
     * @return int 0 if everything went fine, or an exit code
     */
    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $this-&gt;filter-&gt;bind($input);

        $incredulity = \implode('', $input-&gt;getArgument('incredulity'));
        if (\strlen(\preg_replace('/[\\?!]/', '', $incredulity))) {
            throw new \InvalidArgumentException('Incredulity must include only &quot;?&quot; and &quot;!&quot;');
        }

        $exception = $this-&gt;context-&gt;getLastException();
        $count = $input-&gt;getOption('all') ? \PHP_INT_MAX : \max(3, \pow(2, \strlen($incredulity) + 1));

        $shell = $this-&gt;getApplication();

        if ($output instanceof ShellOutput) {
            $output-&gt;startPaging();
        }

        do {
            $traceCount = \count($exception-&gt;getTrace());
            $showLines = $count;
            // Show the whole trace if we'd only be hiding a few lines
            if ($traceCount &lt; \max($count * 1.2, $count + 2)) {
                $showLines = \PHP_INT_MAX;
            }

            $trace = $this-&gt;getBacktrace($exception, $showLines);
            $moreLines = $traceCount - \count($trace);

            $output-&gt;writeln($shell-&gt;formatException($exception));
            $output-&gt;writeln('--');
            $output-&gt;write($trace, true, ShellOutput::NUMBER_LINES);
            $output-&gt;writeln('');

            if ($moreLines &gt; 0) {
                $output-&gt;writeln(\sprintf(
                    '&lt;aside&gt;Use &lt;return&gt;wtf -a&lt;/return&gt; to see %d more lines&lt;/aside&gt;',
                    $moreLines
                ));
                $output-&gt;writeln('');
            }
        } while ($exception = $exception-&gt;getPrevious());

        if ($output instanceof ShellOutput) {
            $output-&gt;stopPaging();
        }

        return 0;
    }
}
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