Michael Smith michaelesmith

Install wkhtmltopdf on Ubuntu

This was tested on:

Ubuntu 14.04 x64
Ubuntu 16.04 x64

Installation

Let's migrate a Symfony 2.8 LTS application to Symfony 3 LTS

Handle deprecations

First of all, ensure you don't have any deprecated!

The Symfony documentation explains it well, but let's sum up:

install the phpunit bridge ($ composer require --dev symfony/phpunit-bridge)
also check all your pages using web profiler and be ensure there is no deprecation error handled
found errors and need help about how to fix it ? I did a sort of guide.

In order to generate and log a warning message about a deprecated Symfony feature, use the trigger_error() function as follows:

trigger_error('The enctype method of the form helper was removed. You should use the new method start instead.', E_USER_DEPRECATED);

Please, be as explicit as possible in the deprecation message and always explain the alternative way to use that feature, property, method or class.

Screencapture and animated gifs

I say "animated gif" but in reality I think it's irresponsible to be serving "real" GIF files to people now. You should be serving gfy's, gifv's, webm, mp4s, whatever. They're a fraction of the filesize making it easier for you to deliver high fidelity, full color animation very quickly, especially on bad mobile connections. (But I suppose if you're just doing this for small audiences (like bug reporting), then LICEcap is a good solution).

Capturing (Easy)

Launch quicktime player
do Screen recording

	using Org.BouncyCastle.Crypto;
	using Org.BouncyCastle.Crypto.Parameters;
	using Org.BouncyCastle.OpenSsl;
	using Org.BouncyCastle.Security;
	using System;
	using System.IO;
	using System.Security.Cryptography;

	namespace MyProject.Data.Encryption
	{

	* {
	font-size: 12pt;
	font-family: monospace;
	font-weight: normal;
	font-style: normal;
	text-decoration: none;
	color: black;
	cursor: default;
	}

	// by Erik Wrenholt
	import java.util.*;

	class Mandelbrot
	{
	static int BAILOUT = 16;
	static int MAX_ITERATIONS = 1000;

	private static int iterate(float x, float y)
	{

	# Hello, and welcome to makefile basics.
	#
	# You will learn why `make` is so great, and why, despite its "weird" syntax,
	# it is actually a highly expressive, efficient, and powerful way to build
	# programs.
	#
	# Once you're done here, go to
	# http://www.gnu.org/software/make/manual/make.html
	# to learn SOOOO much more.

	<?php

	namespace App\EventListener;

	use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
	use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;

	class ExceptionRethrowListener
	{
	public function onKernelException(GetResponseForExceptionEvent $event)

	{% import 'macro.html.twig' as macro %}

	{{ attribute(macro, 'type_1', 'Foobar') }} {# <p>Type One Foobar</p> #}
	{{ attribute(macro, 'type_2', 'Barfoo') }} {# <p>Type Two Barfoo</p> #}