Laravel: Serialization of ‚Closure‘ is not allowed with Jobs and Queues

Posted on 26. Februar 2018 Comments

When dispatching Jobs onto a queue it’s possible to get the following error:

Serialization of ‚Closure‘ is not allowed

This basically means that you are either passing a class that contains anonymous functions („closures“ in PHP) or that in the Job itself there is an anonymous function. This could also be a library you are using. PHP is unable to serialize closures per se. When Jobs get dispatched onto the queue, everything has to be serialized before. If you absolutely must use them this way, look into the Super Closure package by jeremeamia. However, just rewriting the code a little might be easier:

 

Solution

Instead of passing a whole object to the Job like so:

$objOfClassWithClosures = ...;
$job = new Job($objOfClassWithClosures);
dispatch($job);

Pass the Fully Qualified Class Name (that’s what ClassName::class returns) to the job and instantiate the object on the other side, possibly even using Laravels Container:

$job = new Job(ClassWithClosures::class);
dispatch($job);

Inside the job you can then use the constructor to make a new instance of that class:

public function __construct(string $fqcn) {
$objOfClassWithClosures = app()->make($fqcn);
}

 

PHP + Laravel development Packages for atom.io

Posted on 30. Januar 2018 Comments

PHP CS Fixer

brew install php-cs-fixer

apm install php-cs-fixer

Settings:

php path: /usr/local/bin/php

php-cs-fixer path: /usr/local/bin/php-cs-fixer

PHP CS Fixer Rules: @PSR2,blank_line_after_opening_tag,whitespace_after_comma_in_array,blank_line_after_namespace

PHP CS Fixer Arguments: --using-cache=no, --no-interaction, --stop-on-violation

[x] Show Notifications

Ctrl+Cmd+S

Can also be used on commandline for folders, e.g.
$ php-cs-fixer fix app/ --rules=@PSR2,blank_line_after_opening_tag,whitespace_after_comma_in_array,blank_line_after_namespace

 

php-integrator-refactoring (php-integrator-base)

apm install php-integrator-base

apm install php-integrator-refactoring

Linting (also see linter(-php))

Sort use statements

 

linter and linter-php

apm install linter

apm install linter-php

In case linting with php-integrator-base does not work.

 

language-blade and language-vue

apm install language-blade

apm install language-vue

 

minimap

apm install minimap

Short overview over the code on the right side

 

highlight-selected

apm install highlight-selected

 

platform-ide-terminal

apm install platform-ide-terminal

Instead of switching windows, terminal right in atom

Cmd+Shift+T

 

symbols-tree-view

apm install symbols-tree-view

Structured overview on the right side over classes, constants, attributes, methods etc

 

hyperclick and hyperclick-php

apm install hyperclick

apm install hyperclick-php

Cmd+Click on classes, functions etc to go to origin.

Not needed if you installed atom-ide-ui

 

teletype

apm install teletype

Work on the same file with coworkers, encrypted via WebRTC

 

More dependencies might be installed with installing some of these packages

PHP Commandline Notification

Posted on 3. Januar 2018 Comments

When you run long (PHP) jobs it’s easy to forget about the terminal. That’s why I’ve created a small PHP package that will make a little sound. Because PHP itself doesn’t have this functionality anymore it’s possible to just echo the ASCII sign for BEL. Simply put this at the end of your PHP job:

use repat\CommandlineBell;
// flashes screen if possible, otherwise just bell()
CommandlineBell::flash();
// makes a beep sound
CommandlineBell::bell();

Under the hood it’s really just:
echo "0x07";

A good (non-PHP) alternative I found is brb by Viktor Fröberg, just run commands like this

php artisan migrate --seed ; brb

Of course it’s always possible to just run a TTS app on the commandline via exec() like this:

exec("say terminal task done");

Or you could do it similar to brb:

php artisan migrate --seed ; say seeding done

Source on GitHub

One Click Shadowsocks with no technical knowledge needed

Posted on 23. November 2017 Comments

Shadowsocks is a proxy that has been designed and used to circumvent censorship in China. So if it’s possible to get traffic across the Great Firewall of China it pretty much can be used anywhere, e.g. Egypt where VPNs are blocked since mid 2017.

Digital Ocean offers virtual servers for cheap with an easy to understand pricing model. Basically you pay either $5, $10, $20, $40, $80 or $160 per month, for more have a look at pricing at digitalocean.com. These server are general purpose servers, you can do everything with them, which also means, they don’t have anything installed and you need to do everything yourself.

oneclickshadowsocks.de is a service to install shadowsocks on DigitalOcean servers without having to actually login via SSH and entering lots of technical commands in the commandline. It uses the DigitalOcean API to create a Droplet (=server) with shadowsocks already set up and running. All you have to do is to enter the IP address you get via e-mail in your shadowsocks client and the password given to you on the website.

The code is open source and the website itself is hosted on GitHub Pages, which means, you can see the sourcecode of the page itself, running at that very moment. This way other people can verify they nothing shady is going on.

Commandline: Which programs are using network connection

Posted on 29. August 2017 Comments

lsof -P -i -n | cut -f 1 -d " " | uniq

lsof – list open files
-P list port numbers instead of service names
-i list all network files
-n IP addresses instead of host names

cut – cut output
-f specifies fields, separated in the input by the field delimiter character (-d)
-d delimiter

uniq – filters out repeated lines

Backup 2 harddrives with rsync

Posted on 24. August 2017 Comments

Linux

rsync -a -v -P --delete -h --stats /media/repat/hdd1/ /media/repat/hdd2

 

MacOS:
rsync -a -v -P --delete -h --stats /Volumes/hdd1/ /Volumes/hdd2

 

-a all (-r, -l, -t, -p, -g, -o, -D)
-v verbose
-P show progress and continue partial transfers
–delete delete extraneous files from destination dirs
–stats give some file-transfer stats

Note: the last / after hdd1 is important, so the contents of hdd1 are written directly into hdd2. If you forget, there will be a new folder called hdd1 in the folder hdd2

 

Delete empty rows in CSV file with sed

Posted on 23. August 2017 Comments

This is for when you have empty lines (so lot’s of ,,,,,,) in your file.

MacOS

sed -i '' -e '/^,*$/d' filename.csv
find ./ -type f -exec sed -i '' -e '/^,*$/d' {} \;

Linux

sed -i '/^,*$/d' filename.csv
find ./ -type f -exec sed -i '/^,*$/d' {} \;

 

^ marks the beginning of a line
,* marks a possible infinite amount of commas
$ marks the end of a line