Dynamically modify a static variable variable array

Question

Similar to this question Dynamically call a static variable (array) , but for writing to the variables.

I'm trying to initialize a couple static arrays in my constructor, but can't figure out how to code their names dynamically.

When I try this:

class MyClass {
    public static $something1 = array();
    public static $something2 = array();

    function __construct() {
        for( $i = 1; $i <= 2; $i++ ){
            $arr = "something{$dynamic}";
            self::$$arr[] = "a new element";
        }
    }
}

I get this error even if I don't call the constructor:

Fatal error: Cannot use [] for reading

Is there any way to accomplish this without using eval? I'm using PHP 5.4.

I don't know why you were downvoted. It wasn't me. For the record, your answer was correct: self::${$arr}[] = 'a new element'; — Greg
– Greg, Commented Jan 8, 2013 at 22:04
No I meant, why did your question get downvoted? I don't feel it should have. Anyway I added my answer as an actual answer, below. — Madbreaks
– Madbreaks, Commented Jan 8, 2013 at 22:05
You bet. Since you indicated my answer was correct please mark it as such by clicking the checkbox next to the up/down vote counter. — Madbreaks
– Madbreaks, Commented Jan 8, 2013 at 22:08

Madbreaks · Accepted Answer · 2013-01-08 22:02:20Z

3

Try this:

self::${$arr}[] = 'a new element';

The curly brackets provide the proper scope to the $

answered Jan 8, 2013 at 22:02

Madbreaks

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