parameters.yml 中的数字索引损坏了 Symfony2

Question

I have in my parameters.yml an array of months which make the relation between the php function date('m') (months number with leading zero) and a letter choosen by default for generating a code.

months:
    01: 'A'
    02: 'B'
    03: 'C'
    04: 'D'
    05: 'E'
    06: 'F'
    07: 'G'
    08: 'H'
    09: 'I'
    10: 'J'
    11: 'K'
    12: 'L'

And here is the result of a var_dump($this->getParameters('months')) :

array (size=11)
1 => string 'A' (length=1)
2 => string 'B' (length=1)
3 => string 'C' (length=1)
4 => string 'D' (length=1)
5 => string 'E' (length=1)
6 => string 'F' (length=1)
7 => string 'G' (length=1)
0 => string 'H' (length=1)
10 => string 'J' (length=1)
11 => string 'K' (length=1)
12 => string 'L' (length=1)

I finally resolve it removing the leading zero of the index, but is anybody know why the 08 is changed to 0 and 09 index disappear ?

Answer 1

The reason is that if you don't use the quotes 01 , 02 ... 07 are interpreted as base 8 numbers (octal), 08 and 09 are Invalid numeric literal (invalid base 8 number), 10..12 are interpreted as integer numbers, you need use the quotes to fix this:

months:
    '01': 'A'
    '02': 'B'
    '03': 'C'
    '04': 'D'
    '05': 'E'
    '06': 'F'
    '07': 'G'
    '08': 'H'
    '09': 'I'
    '10': 'J'
    '11': 'K'
    '12': 'L'

See reference here http://symfony.com/doc/current/components/yaml/yaml_format.html#numbers

Answer 2

PHP uses the 0 prefix to denote that the number that follows is in octal. Thus 8 and 9 are invalid.

Just run echo 08; or echo 09; to see the error output.

Answer 3

That's the difference between an integer and a string .

Change 01 to '01' and your problem is solved.

But why do you store all alphabetic chars in parameters.yml? It doesn't seem to be environment related and there is an easy way to get the same array like this:

$alphas = range('A', 'L');