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Is there a difference between using single-quoted and double-quoted strings?

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There is a small difference, single-quoted strings don't support interpolation:

{% set string = 'There is a #{car}.' %}

The above example won't work. If you want to use it, you need to wrap your string in double quotes:

{% set string = "There is a #{car}." %}
  • 1
    This is similar to the PHP logic between single and double quotes. – Lindsey D Jun 16 '14 at 22:16
  • Except that you can concatenate string in PHP using single quotes (using "."). Twig still requires double quotes (using "~"). – Bryan Redeagle Jun 17 '14 at 11:22
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    @Bryan {{ 'test' ~ 'String' }} works for me. – carlcs Jun 25 '14 at 15:06
  • @ChristianSeelbach Yep. You're right. I misread the Twig docs. – Bryan Redeagle Jun 25 '14 at 15:14

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