Linux, PHP, LAMP, The Web in a blog

How to Create a Screencast / Videocast / Video

Daniele Occhipinti — Sun, 20 Dec 2009 00:00:00 +0000

Use Camstudio this way:
_ set all the relevant settings
_ use pause with keyboard shortcuts frequently
_ record different cuts and put them together with VirtualDub

How to do that with VirtualDub?
_ Open a file
_ Video > Direct Stream Copy
_ File > Append video segment
_ File > Save as AVI

How to Download Movies & Files on Linux

Daniele Occhipinti — Sun, 20 Dec 2009 00:00:00 +0000

_ Find the torrent with http://www.mininova.org/ or search on Google “Gladiator download torrent”
_ Use Transmission to download the torrent
_ opersubtitles.org

how to install flash in Firefox for CentOS

Daniele Occhipinti — Sat, 19 Dec 2009 00:00:00 +0000

* Go to youtube.com and try to play a video. You should not be able to play it
* Instead of the video, there should be a link like ‘Install Flash’
* You should be redirected to the Adobe website where you can download an RPM package
* After downloading it, install it with the rpm -i command (as root)
* Then, launch:
sudo yum install flash-plugin

PHP - Nice Debug Trace

Daniele Occhipinti — Fri, 20 Nov 2009 10:17:49 +0000

echo parse_backtrace(debug_backtrace());


function parse_backtrace($raw){
$output=“”;
foreach($raw as $entry){

$output.=“\nFile: “.$entry[‘file’].” (Line: “.$entry[‘line’].“)\n”;

$output.=“Function: “.$entry[‘function’].“\n”;

$output.=“Args: “.implode(“, “, $entry[‘args’]).“\n”;

}

return $output; } ?>

CSS Sprite Online Generator

Daniele Occhipinti — Sat, 07 Nov 2009 12:21:38 +0000

http://spritegen.website-performance.org/

You can’t include animated gifs in the sprite (otherwise they will be still).

You can’t include list bullets because if the list item is quiet long, the images under the bullet point icon in the sprite will be shown.

Installing Memcached and PHP Memcache on CentOS and Ubuntu

Daniele Occhipinti — Wed, 04 Nov 2009 18:13:26 +0000

On CentOS:

Install Memcached
_ yum install memcached
_ /sbin/chkconfig memcached on
_ /etc/init.d/memcached start
_ vim /etc/sysconfig/memcached, and edit:
OPTIONS=”-l 127.0.0.1″

Install PHP extension for Memcache:
_ yum install zlib-devel
This will prevent this error from occurring:
configure: error: memcache support requires ZLIB. Use –with-zlib-dir=

to specify prefix where ZLIB include and library are located
_ pear install pecl/memcache
You should have:
/usr/lib/php/modules/memcache.so
_ echo “extension=memcache.so” > /etc/php.d/memcache.ini
_ /etc/init.d/httpd restart

On Ubuntu:

I’ve installed: apt-get install php5-memcache
I also have memcached installed: apt-get install memcached
restart apache
start memcached

Minify CSS and Javascript Files With YUI Compressor From Linux Command Line

Daniele Occhipinti — Mon, 02 Nov 2009 11:49:34 +0000

You can download YUICompressor from here:

http://yuilibrary.com/downloads/#yuicompressor

Extract the package

You need Java to execute it (on Ubuntu):

sudo apt-get install sun-java6-jre

To use it, you can execute this on the command line:

cat jquery-*.min.js library.js common.js lists.js tasks.js contexts-mgmt.js keys-mgmt.js | java -jar /home/dan/Desktop/yuicompressor-2.4.2/build/yuicompressor-2.4.2.jar –type js -o all`date +%Y%m%d%I%M%S`.js

Symfony - Creating a New Plugin

Daniele Occhipinti — Thu, 29 Oct 2009 12:45:38 +0000

You need this just once:

_ sudo apt-get install php-pear
_ sudo pear channel-discover plugins.symfony-project.com

For every package:
_ Create the file package.xml and put it on the root of the plugin
_ launch: pear package

To update the repository, use this URL:

http://svn.symfony-project.com/plugins/plugin_name

MySQL: Deactivate Referential Integrity

Daniele Occhipinti — Sat, 17 Oct 2009 10:43:52 +0000

If you database has InnoDB tables, you will need to deactivate referential integrity while restoring data. Unfortunately, this can’t be done using the mysqldump utility. To do so, backup your database as you would normally. When done, open the SQL file and add the following statement at the very beginning:

SET FOREIGN_KEY_CHECKS=0;

…and add the following at the end of the file:

SET FOREIGN_KEY_CHECKS=1;

Linux Bash: Append and Prepend Strings to Files

Daniele Occhipinti — Sat, 17 Oct 2009 10:37:55 +0000

I want to append the string “BYE” to the file test.txt

echo “BYE” >> test.txt

Now, I want to prepend the string “HI” to the file test.txt

echo “HI”|cat - test.txt > /tmp/out && mv /tmp/out test.txt