Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: “Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system.”

A block of code is set as follows:

public function testInvalidNoLowerCasePassword() {
  $person = new Person('[e-mail]');
  $this->assertFalse($person->create_login('UPPERCASE1!'));
  $this->assertNull($person->getPassword());
}

Any command-line input or output is written as follows:

ls -l|grep "cats"

Tips or important notes

Appear like this.