Notes from projects

00-project-notes.md

An ongoing list of notes that I've found useful over time, gathered in one spot.

access-property-defined-in-class.txt

Question: How does a function defined in a class access a property defined within the class?

e.g.
private $pageReader;

public function __construct(PageReader $pageReader) {
-- is just an argument for the method, whatever comes in creates the instance, e.g.
    new Page ('this thing');
    
    $this->pageReader = $pageReader;
}

public function show($params) {
    $data['content'] = $this->pageReader ...
}
-- just uses the property of the instance

Question: How would a class know to use which implementation if an interface and class exist?
How the decision is made is up to the developer, preferably using dependency injection.
e.g.
$page = new Page (new FilePageReader('/path/to/file'));

cannot-create-composer-cache-directory.txt

Error message:
Cannot create cache directory /home/tylae/.composer/cache/repo/https---packagist.org/, or directory is not writable. Proceeding without cache
Cannot create cache directory /home/tylae/.composer/cache/files/, or directory is not writable. Proceeding without cache

Problem is that ownership of the folder is not set to the user, so ownership needs to be switched.
I could not do sudo -R tylae /home/tylae/.composer/cache/repo/https---packagist.org/ because it does not exist yet,
so I needed to change ownership of /.composer.

sudo chown -R username /home/username/.composer

Running composer update would then work without error.

cannot-install-composer-from-composer-script.txt

I could not install composer from the script on the website (https://getcomposer.org/download/).  composer -version would return an error.
running sudo apt install composer installed it.  I'm not sure if it's the most updated version however.

keeping-files-backed-up-from-virtual-box.txt

samayo
So I say put your config files and mysql databased on your shared folder

Tiffany
@samayo like nginx files?
 
samayo
Yeah
 
samayo
But for now take a snapshot

Tiffany
@samayo store them in shared folder, then symlink where necessary?
 
samayo
Symlink to the shared folder. I tried it once it's a bit of a hastle in the begining.
 
Tiffany
yeah, I can see the usefulness of doing it, but not looking forward to setting it up :P
 
samayo
Yeah it's a real pita .. but once I lost a year's worth of work b/c vbox crushed and I could not recover the mysql data
So you should probably start saving ..it weekly
 
Tiffany
snapshot or shared folder?
 
samayo
Your mysql data
Sometimes if there is no way to even start vbox a snapshot wont do you any good

unit-test-session-start.txt

if some class has session_start how will you unit test it? i am getting cannot send session cookie --headers already sent.
https://chat.stackoverflow.com/transcript/message/38502494#38502494

wrap it in a method and mock it when testing
class WhatYouAreTesting{
  protected function session_start(){ session_start(); }
}
$obj = new class(...) extends WhatYouAreTesting{
  protected function session_start(){ override; }
}