Select your answer: 🧐

  A: Fatal error: Uncaught Error: Undefined constant 'Foo\Bar'   B: Parse error: syntax error, unexpected '\' (T_NS_SEPARATOR)'   C: Foo\Bar\A   D: Foo\Bar\B

Submit

---

✅ { answer }: correct!

❌ { answer }: Wrong answer!

PHP namespaces can contain space characters, but they can\'t begin with a backslash. The right answer was "A".

▶  Click here to run this code on 3v4l.org

Poll

• ✅ A: Fatal error: Uncaught Error: Undefined constant 'Foo\Bar' - 12.5%
  percent%
• B: Parse error: syntax error, unexpected '\' (T_NS_SEPARATOR)' - 37.5%
  percent%
• C: Foo\Bar\A - 17.5%
  percent%
• D: Foo\Bar\B - 32.5%
  percent%

▶  Click here to see the Twitter poll

Click here to see output differences between PHP versions

As I am writing this quiz (2020-07-31), there is a slight difference between all versions and PHP 8.0.0alpha3:
With this last version, the exception message "Foo\Bar" is wrapped by double quotes instead of single quotes for other versions (\'Foo\Bar\'). 🤔

---

Going further... 🤓

• Read the namespaces documentation on php.net

Want More? 🤔

Next question ⏩