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Example usage

Linux Rename



there’s a really cool terminal command called “split” if you have to break up a large CSV file, such as something like a million rows, into separate files with 100k rows in each, you can just run something like
split thefile.csv -d –lines=”100000″
-d uses a numeric file increment instead of letters
from what I can tell this method will remove the file extension but you can use another terminal command called “rename” something like this should do it
rename ‘s/&/.csv’ the file* .

Useful links:


Implement dependency injection


Quick notes on implementing dependency injection


Most if not all PHP frameworks utilize dependency injection. Its allowing PHP to automate supplying function parameters. In my code example below in the class Test the function test requires the User class to be passed in as a parameter. Maybe you’ll want more things like Route or maybe some kind of Registry object. Having decency injection helps reduce redundant code by instantiating the function everywhere needed.

class user {
   public $id = 1;

class Test {
   public static function test( User $user ) {
      return $user->id;

Here is a VERY basic example of how to implement PHP reflection.

$controller = Test;
$method = test;
$rm = new \ReflectionMethod($controller, $method);
$parameters = [];
foreach ($rm->getParameters() as $inc => $parameter) {
// Quick example getting the parameters and
// which class that parameter location is looking for
$class_name = $parameter->getType()->getName();
// Instatiate the new class
$parameters[] = new $class_name;
//Call the controller and method with the parameters you were expecting
call_user_func_array([$controller, $method], $parameters);

The idea is that PHP will use reflection to look at the method you are trying to call and figure out what parameters are expected. My example is simple, you can do a lot more. The idea is to present in note style form a starting point and to present the idea in a functional way.


Here are a few links for reference: