Accessing specified Element of Array with Twig

Question

I have the following array and i want to access the value of a specified element with twig.

numbers => Array ([01234567] => Array ( [0] => 9876543210 [1] => 8765432109 [2] => 0000000000))

I know there is only one entry in numbers, so I want to access the array with the key 01234567 directly.

Even tough numbers|keys[0] does return the correct key, I can't use it like numbers[numbers|keys[0]] to get the array. I also tried the attribute(array, item) function, but i didn't got it to work.

Is it possible to access it directly or do I need to use loops?

Not sure I understand your question. Does the current function work? php.net/manual/en/function.current.php — Gohn67
– Gohn67, Commented Jan 17, 2013 at 20:08
It is, if you write a custom twig extension, but that's probably not what you want — Dutow
– Dutow, Commented Jan 17, 2013 at 20:15

Dutow · Accepted Answer · 2013-01-17 21:04:37Z

1

You have found a probably undocumented "feature" of Twig. If you check the source code, twig tries to determine if the given key is numeric, or not. It does this check with the ctype_digit function, which checks if a variable contains only numeric characters.

The example in your question contains an array key, which meets this conditions: it contains only numbers. Unfortunately, it also starts with a zero, which is removed when the string is converted into an integer.

I'm not exactly sure that this is intended behavior, so you may try to report this example as a bug.

For the current twig implementation, because everything except the loop construct uses the getAttribute function, you have no other choice but to use a for loop.

edited Jan 17, 2013 at 21:04

answered Jan 17, 2013 at 20:19

Dutow

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3 Comments

KenavR Over a year ago

Does this work for you? For me it doesn't, when I use {{array_item}} it doesn't show anything.

Dutow Over a year ago

wow, twig removes the first zero from the number, I haven't expected this, even when I force a string concatenation (e.g. {% set array_item = numbers[index_var] %} still generates an exception)

KenavR Over a year ago

Thanks for your efforts, i am going to report it "tomorrow".

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