Class constant not accepted by php 5.4

Question

I have a class constant

const DATE_REGEX = '@^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$@';

which I want to use in a static array as part of a string:

public static $rules = [
    'startdate' => ['required','regex:' . self::DATE_REGEX],
];

Both of those lines are part of the same class.

On my dev machine (PHP 5.6) this works fine, but on the staging server (PHP 5.4) this throws the following error:

syntax error, unexpected '.', expecting ']'

How can I rewrite this to be PHP 5.4 compatible?

tacone · Accepted Answer · 2014-10-27T13:08:01.340

4

PHP 5,4 does not allow for expressions in the class properties declaration.

edited Oct 27 '14 at 13:08

answered Oct 27 '14 at 11:27

tacone

To further this point. PHP 5.6 does allow for this kind of initialization. – robbmj Oct 27 '14 at 11:30
as described here: http://php.net/migration56.new-features#migration56.new-features.const-scalar-exprs – VolkerK Oct 27 '14 at 11:31
Ok. I thought this was introduced in 5.3 for some reason. – Tom Macdonald Oct 27 '14 at 11:45

1 Answers1