Select your answer: 🧐

  A: not numeric: 0, not numeric: 1337   B: not numeric: 0, numeric: 1337   C: numeric: 42, not numeric: 1337   D: numeric: 42, numeric: 1337

Submit

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✅ { answer }: correct!

❌ { answer }: Wrong answer!

A numeric value can be prefixed by blank characters, but not after. The right answer was "C". This will change with PHP 8 which will accept blank characters after.

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

Poll

• A: not numeric: 0, not numeric: 1337 - 33.3%
  percent%
• B: not numeric: 0, numeric: 1337 - 23.3%
  percent%
• ✅ C: numeric: 42, not numeric: 1337 - 10%
  percent%
• D: numeric: 42, numeric: 1337 - 33.3%
  percent%

▶  Click here to see the Twitter poll

Click here to see output differences between PHP versions

With PHP 8 the right answer is "D".

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Going further... 🤓

• Read the "Saner numeric strings" RFC on php.net

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