How php compiles the source code ?

PHP compiles source code into Zend Engine bytecode - this is done by the Zend
compiler in zend_language_scanner.l, zend_language_parser.y and
zend_compile.c. This code is the executed by the opcode engine in
zend_execute.c and zend_vm_execute.h. The latter is generated from
zend_vm_def.h by means of the script zend_vm_gen.php.

For  a good intro to php internals there is a presentation in french 
http://julien-pauli.developpez.com/tutoriels/php/internals/presentation/

I saw it via this thread on php internals 

Running thin server in development instead of mongrel

need to add to the  Gemfile

gem 'thin', :group => 'development'

then run

$ bundle install

to start it type
$ rails server thin

RubyRails for PHP programmers starting points

If you have php code that needs to be converted to ruby/rails there are a few starting points
hyperpolyglot should be your homepage:
http://hyperpolyglot.org/scripting

On the ruby site there is a nice intro on Similarities and Differences.

From Rails for Php Programmers i used this pdf PHP to Rails Reference (extract)
on the translating php cookies and session (params for post/get ...)

Also the PHP to Ruby reference is very good
https://github.com/maintainable/php-ruby-reference

Ps: main site http://railsforphp.com/ seems to be down at the moment but i guess you can fork and build the reference yourself

Getting the list of friends and their feeds with python open_facebook

I use django facebook api and here is the example i use to list my friends and their feeds

new fdb firebird driver example :execute insert statement

Here is my example for inserting one row in firebird database with fdb python driver

Installing kinterbasdb on Ubuntu Server 12.04 64 bits (python 2.7.3)

 The official way is from svn , otherwise you will get this error

_kiservices.c: In function ‘_init_kiservices_ibase_header_constants’:
_kiservices.c:809:3: error: ‘isc_info_db_impl_isc_a’ undeclared (first use in this function)

Old driver and soon to be deprecated , the recommended way is to use fdb

svn co https://firebird.svn.sourceforge.net/svnroot/firebird/python/kinterbasdb/trunk/ kinterbasdb
cd kinterbasdb

sudo python setup.py install

Connect to firebird using the new python fdb driver

Install the firebird driver (you might need firebird2.5-dev headers)

 pip install fdb

use this documentation link  for the moment


and here is your first connection

What oracle really wants is

A full rewrite of the Java classees with core api and classes and that is what Microsoft "suffered" with the C# Yes C#/.net combo is a bad rewrite of the Java language with COM api and all the unportable DirectX included https://www.eff.org/deeplinks/2012/05/oracle-v-google-and-dangerous-implications-treating-apis-copyrightable

Timezone offset in seconds php vs ruby

echo date('Z');

10800

and timizone seems to be set right


date_default_timezone_set('Europe/Bucharest');echo date('Z');
10800

and in ruby it gives


Time.zone.now.utc_offset()
 => -25200


seems that rails and php lives in different timzones

so try to use localtimezone and is correct now


l = t.getlocal
 => 2011-06-27 10:10:00 +0300
1.9.2p318 :025 > l.gmt_offset
 => 10800

One way to avoid the Adobe tax

One coleague of mine extracted the layers from psd files with image magick 

I wish gimp could preserve all these layers when you import the psd , or maybe we can do a python plugin that will extract the layers and import them in the the gimp layers

I love pip install

Here is how easy it is to install fdb firebird driver

pip install fdb
Downloading/unpacking fdb
  Downloading fdb-0.x.x.tar.gz (xxxKb): xxxKb downloaded
  Running setup.py egg_info for package fdb
    
Installing collected packages: fdb
  Running setup.py install for fdb
    error: could not create '/usr/local/lib/python2.7/dist-packages/fdb': Permission denied
    Complete output from command /usr/bin/python -c "import setuptools;__file__='/home/mariuz/build/fdb/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /tmp/pip-8bcPXK-record/install-record.txt:
    running install

running build

running build_py

creating build

creating build/lib.linux-x86_64-2.7

creating build/lib.linux-x86_64-2.7/fdb

copying fdb/services.py -> build/lib.linux-x86_64-2.7/fdb

copying fdb/fbcore.py -> build/lib.linux-x86_64-2.7/fdb

copying fdb/ibase.py -> build/lib.linux-x86_64-2.7/fdb

copying fdb/__init__.py -> build/lib.linux-x86_64-2.7/fdb

running install_lib

creating /usr/local/lib/python2.7/dist-packages/fdb

error: could not create '/usr/local/lib/python2.7/dist-packages/fdb': Permission denied

----------------------------------------
Command /usr/bin/python -c "import setuptools;__file__='/home/mariuz/build/fdb/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /tmp/pip-8bcPXK-record/install-record.txt failed with error code 1
Storing complete log in /home/mariuz/.pip/pip.log

#Let's use the sudo super cow powers 

mariuz@borki7:~$ sudo su 

root@borki7:/home/mariuz# pip install fdb
Downloading/unpacking fdb
  Running setup.py egg_info for package fdb
    
Installing collected packages: fdb
  Running setup.py install for fdb
    
Successfully installed fdb
Cleaning up...

Firebird remote interface vs direct file access for firebird databases

The scenario it can happen when using firebird classic (see the end of the article) You skip the remote interface (tcp/ip) and access the database directly by typing

isql-fb database path

here is my setup when i try to use the database directly or without password the server is not using the remote interface (There is no remote server/interface in the show version command)

sudo isql-fb /var/lib/firebird/2.5/data/rubyonfire.fdb
Database:  /var/lib/firebird/2.5/data/rubyonfire.fdb

SQL> show version;
ISQL Version: LI-V2.5.2.26466 Firebird 2.5
Server version:
Firebird/linux AMD64 (access method), version "LI-V2.5.2.26466 Firebird 2.5"
on disk structure version 11.2
quit;

check if the server is up with telnet localhost 3050 and then force the tcp ip method to connect using the remote interface use locahost:path 

SQL>connect "localhost:/var/lib/firebird/2.5/data/rubyonfire.fdb" user 'SYSDBA' password '********';

SQL> show version;
ISQL Version: LI-V2.5.2.26466 Firebird 2.5
Server version:
Firebird/linux AMD64 (access method), version "LI-V2.5.2.26466 Firebird 2.5"
Firebird/linux AMD64 (remote server), version "LI-V2.5.2.26466 Firebird 2.5/tcp /P12"
Firebird/linux AMD64 (remote interface), version "LI-V2.5.2.26466 Firebird 2.5/tcp )/P12"
on disk structure version 11.2

What you can learn from instagram deal and become a billionare

If you look at the tech behind it:
- use Ubuntu server or debian on amazon ec2 (I guess you can choose your own cloud solution)
- use Django with a shraded relational database (I would chose firebird)
- use nginx with gunicorn or uwsgi
- you use memcache right ?
- for notifications on apple use pyapns , billions of messages are send with it
- create and write a android app
- use gearman
- redis
- scare the hell out of facebook

- profit

Rails project bash aliases

To type less in the bash console on my Lubuntu
I use these bash aliases added in ~/.bashrc

Lubuntu 12.04 countdown!

The Lubuntu 12.04 countdown is ready

Migrating to django 1.4

First i have fixed the warnings

[Sun Mar 25 21:15:41 2012] [error]   DeprecationWarning
[Sun Mar 25 21:15:42 2012] [error] /usr/lib/python2.5/site-packages/django/conf/__init__.py:75: DeprecationWarning: The ADMIN_MEDIA_PREFIX setting has been removed; use STATIC_URL instead.
[Sun Mar 25 21:15:42 2012] [error]   "use STATIC_URL instead.", DeprecationWarning)
[Sun Mar 25 21:15:42 2012] [error] /usr/lib/python2.5/site-packages/django/core/cache/__init__.py:82: DeprecationWarning: settings.CACHE_* is deprecated; use settings.CACHES instead.
[Sun Mar 25 21:15:42 2012] [error]   DeprecationWarning

so i have deleted the line ADMIN_MEDIA_PREFIX from settings.py and need to configure the "/media" for the admin url also replaced

CACHE_BACKEND = 'locmem://'

with

{
    'default': {
        'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
    }
}

For people who belive in ORM: Please learn SQL

Here is one example of what happens when django ORM can be optimized
Profiling Django Applications: A Journey From 1300 to 2 Queries

EC2 is about 10-20 times more expensive than dedicated hosting.

Quote of the day via ycombinator:

Even if reserved instances save us 22% over 3 years, it still doesn't even come close. Reserved instances also force me to commit to using a certain type of EC2 instance for 3 years with lots of money upfront. Moreover, IO is ridiculously bad on EC2 and there's nothing that can be done about it. Even RAIDing a gazillion EBS volumes together doesn't do much. I'm glad the truth about how expensive EC2 really is is starting to come out. Hopefully it will force them to revise their pricing, or at least offer more processing power for the same price.

I ran some benchmarks a few weeks ago that show how expensive EC2 really is

Agreed. Here's a good relevant blog post by mark maunder challenging the "cloud hype"  http://markmaunder.com/2011/10/31/clouded-vision/

Another thing that is overpriced is the memory , here is a quote from the basecamp's next memory cache article (see the comments section)


They have brought 864GB of RAM that looks like below

Total price was $12,000
Compare that with Amazon :Just checked AWS Elastic Cache’s pricing.
It would cost around 20k / month for ~ 800 GB of Memory. (12 * Quadruple Extra Large nodes / 68 GB)

Ati fglrx gpu blacklisted in latest chrome beta on Lubuntu/Ubuntu 11.10 with the fglrx driver

Although it works just fine if i use to ignore the blacklisting
Tested on two systems with the current drivers and quite new gpus

See bellow

Here are the details
:

php shell script that will run runs at specific hour with crontab and send emails with the html form extracted content

Here is how to create a daily crontab script that runs at specific hour 

gets the web content and then saves the output in a file folder (the form must use a sumbit button with post) and then 

it send email with the html file 

you need to install php5-cli , php-pear 

sudo apt-get install php5-cli php-pear

and then from pear Mail , Mail_Mime http://pear.php.net/package/Mail_Mime/redirected

sudo pear install Mail_Mime

sudo pear install Mail

crontab -l

# m h  dom mon dow   command
0 1 * * * /home/ubuntu/curl_cron.php

cat /home/ubuntu/curl_cron.php