Command line debugger

Debian and Ubuntu

apt-get install php5-phpdbg
apt-get install php7.0-phpdbg
apt-get install php7.1-phpdbg
						

Red Hat and CentOS

yum install php56-php-dbg
yum install php70-php-dbg
yum install php71-php-dbg
dnf install php-dbg
						

Mac OS X

brew tap homebrew/php
brew install php70 --with-phpdbg
						

From source

./configure --enable-phpdbg
						

function fizzbuzz(int $n): string {
  if (0 == ($n % 3)) {
    return 'Fizz';
  } elseif (0 == ($n % 5)) {
    return 'Buzz';
  }
  return (string) $n;
}

foreach (range(1, (int) $_SERVER['argv'][1]) as $n) {
  echo fizzbuzz($n).' ';
}
echo "\n";
						

class TableFlipException extends Exception {}

function （╯°□°）╯︵ ┻━┻() {
  throw new TableFlipException('ruh roh');
}

（╯°□°）╯︵ ┻━┻();
						

class TableFlipException extends Exception {}

function （╯°□°）╯︵ ┻━┻() {
  throw new TableFlipException('ruh roh');
}

set_exception_handler(function ($e) { echo $e; });

（╯°□°）╯︵ ┻━┻();
						

function （╯°□°）╯︵ ┻━┻() {
  throw new TableFlipException('ruh roh');
}
						

LawnGnome/confoo-tweeps

#define ZEND_THROW                           108
						

$_SERVER = [
  'HTTP_HOST' => 'localhost',
  'HTTP_ACCEPT' => '...',
  ...
];
$_GET = [];
$_REQUEST = [];
$_POST = [];
$_COOKIE = [];
$_FILES = [];
chdir('public'); include 'index.php';
						

LawnGnome/phpdbg-fake-request
lawngnome/phpdbg-fake-request

<tr>
<td>nefarioushax0r</td>
<td><script>alert("I PWNED U NOOB LOLX0RZ")</script></td>
</tr>
						

http://127.0.0.1:9000/?page=2

Route::get('/', function () {
    $tweeps = DB::table('tweeps')->paginate(15);
    ob_start();
?>
...
<?php foreach ($tweeps as $tweep): ?><tr>
	<td><?= $tweep->account ?></td>
	<td><?= $tweep->name ?></td>
</tr><?php endforeach ?>
...
<?php
    return ob_get_clean();
});
						

Thank you!

Questions?

@LGnome

Slides: https://lawngnome.github.io/phpdbg-for-fun-and-profit/

Image credits