Accessing array values using indexes in Twig

Question

I'm having some difficulties using Twig.

When I call {{ dump(photos) }} I get:

array (size=4)
    0 => string 'gjdh15,jpg,200,200' (length=18)
    1 => string 'gjdh13,jpg,200,200' (length=18)
    2 => string 'gjdh12,jpg,200,200' (length=18)
    3 => string 'gjdh10,jpg,200,200' (length=18)

When I call {{ dump(photos[0]) }} I get:

string 'gjdh15,jpg,200,200' (length=18)

However when I call {{ dump(photos[1]) }} I get an exception :

Key "1" for array with keys "0" does not exist

When it clearly does.

Is there a special way to access array values using an index in Twig? (I can't use a loop).

I've reproduced your problem and it works for me. Maybe problem occurs in different line? — Bartek
– Bartek, Commented Jun 11, 2014 at 8:07
Where does photos come from? Is it really an array, or something that behaves like one? — Maerlyn
– Maerlyn, Commented Jun 11, 2014 at 8:56
@Sparkup What do you get if {{ dump(photos|keys) }}? You can also try {{ cycle(photos, 1) }} — Javad
– Javad, Commented Jun 11, 2014 at 14:51

Alain · Accepted Answer · 2014-06-11 15:02:54Z

1

To access a specific array value, you can use the attribute function, it works with both array and objects:

{{ attribute(photos, 1) }}

If the array key (or object attribute) may not exist, you can add the default filter to catch exceptions and print a fallback value.

{{ attribute(photos, 1)|default('No picture') }}

answered Jun 11, 2014 at 15:02

Alain

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