记录时的PHP数组在服务器和本地看起来不同

I have a weird problem with PHP array.

Locally, when logged array looks like this:

array( 0 => '7')

Same array when logged on server looks like this:

array(7);

I am logging it using Monolog \Log::info method. PHP version on server is 5.5.20 and locally 5.6.6 I am using Laravel framework version 4.2

I was trying to enforce all kinds of casting, and adding keys but no luck. This small difference is responsible for huge bug in my app.

Thanks