php - Parse error: syntax error, unexpected '[' How to fix this one?

I'm trying to initialize a function of CI in my native code.

$cipher->initialize(
        [
         'driver'=>'openssl',
         'key' => $key
        ]

     );

I'm getting an error of
Parse error: syntax error, unexpected '['

Can I ask how to fix this?

Using Php 5.3.3

Answer

You are using PHP 5.3. The Array Initialization Construct: [] will not work. Instead, use this approach:

    
        $cipher->initialize(
                array(
                 'driver'=>'openssl',
                 'key' => $key

                )
        );