Anil Konsal

Page not found in pagination on Category Page in WordPress

Anil Konsal — Wed, 02 Nov 2011 07:49:29 +0000

If I set the value of posts_per_page variable on query_posts to a lower value than that set on the settings page than I will get the 404 error.
Example: settings set to 10 posts per page [$ppp = get_option('posts_per_page') will echo 10]
posts_per_page set to 3 on query_posts
If I have a total of 9 posts on my wordpress database then, with the settings above, page two will not show and I get the 404 error!

Canvas Padded thumbnails using PHP and GD in Zend Framework Application

Anil Konsal — Fri, 07 Oct 2011 12:31:21 +0000

function showThumbnail($imageFileName='', $width='', $height='', $cwidth='', $cheight='')
{
	$cfg = new Zend_Config_Ini(APPLICATION_PATH.'/configs/application.ini', 'production');
	$path = $cfg->resources->frontController->imageupload->path;
	$publicpath = $cfg->resources->frontController->imageupload->publicpath;

	$pi = pathinfo($imageFileName);
	$filename = $pi['filename'];
	$ext = $pi['extension'];

	$thumbname = $filename.'-'.$width.'X'.$height.'.'.$ext;

	$fspath = APPLICATION_PATH.'/..'.$path.'/'.$imageFileName;
	$fspathThumb = APPLICATION_PATH.'/..'.$path.'/'.$thumbname;

	if(!file_exists($fspathThumb)) {
		thumb($fspath, $width, $height, $cwidth, $cheight, $fspathThumb);
	}

	return $publicpath.'/'.$thumbname;
}

function thumb($img, $w, $h, $cw='', $ch='', $thumb, $fill='') {
	if (!extension_loaded('gd') && !extension_loaded('gd2')) {
		trigger_error("No dispones de la libreria GD para generar la imagen.", E_USER_WARNING);
		return false;
	}

	$imgInfo = getimagesize($img);
	switch ($imgInfo[2]) {
		case 1: $im = imagecreatefromgif($img); break;
		case 2: $im = imagecreatefromjpeg($img);  break;
		case 3: $im = imagecreatefrompng($img); break;
		default:  trigger_error('Tipo de imagen no reconocido.', E_USER_WARNING);  break;
	}

	if ($imgInfo[0] <= $w && $imgInfo[1] <= $h) {
		$nHeight = $imgInfo[1];
		$nWidth = $imgInfo[0];
	}else{
		if ($w/$imgInfo[0] < $h/$imgInfo[1]) {
			$nWidth = $w;
			$nHeight = $imgInfo[1]*($w/$imgInfo[0]);
			$ny = ($h - $nHeight)/2;
		}else{
			$nWidth = $imgInfo[0]*($h/$imgInfo[1]);
			$nHeight = $h;
			$nx = ($w - $nWidth)/2;
		}
	}

	$nWidth = round($nWidth);
	$nHeight = round($nHeight);

	$newImg = imagecreatetruecolor($nWidth, $nHeight);
	$newImg = imagecreatetruecolor($w, $h);
	$fillColor = imagecolorallocate($newImg, 0xFF, 0xFF, 0xFF);
	imagefill($newImg, 0, 0, $fillColor);

	imagecopyresampled($newImg, $im, $nx, $ny, 0, 0, $nWidth, $nHeight, $imgInfo[0], $imgInfo[1]);

	switch ($imgInfo[2]) {
		case 1: imagegif($newImg , $thumb); break;
		case 2: imagejpeg($newImg, $thumb);  break;
		case 3: imagepng($newImg, $thumb); break;
		default:  trigger_error('Imposible mostrar la imagen.', E_USER_WARNING);  break;
	}

	imagedestroy($newImg);
}

SVN Post Commit hook

Anil Konsal — Sun, 02 Oct 2011 06:47:19 +0000

Some days ago, I got a requirement of giving access to 3 users to my SVN repo over ssh.
#groupadd dev #useradd -g dev auser #useradd -g dev buser #useradd -g dev cuser
Then set the passwords for each user.

For SVN, update changes, you need to have the working copy owned by dev group
#chmod 0775 -R myworkingcopy #chown -R apache:dev myworkingcopy
For svn post commit hook
#chown apache:dev post-commit #chmod 0755 post-commit
The point here is that the user committing the changes should have the write permissions to the working copy and execute permissions on the post-commit hook

and all is good.

MVC .htaccess with exclusion of .html files

Anil Konsal — Tue, 30 Aug 2011 06:41:27 +0000

RewriteEngine on


RewriteRule ^\.htaccess$ - [F]

RewriteRule ^(.*)\.html$ - [L]

RewriteCond %{REQUEST_URI} =""

RewriteRule ^.*$ /public/index.php [NC,L]
RewriteCond %{REQUEST_URI} !^/public/.*$

RewriteRule ^(.*)$ /public/$1
RewriteCond %{REQUEST_FILENAME} -f

RewriteRule ^.*$ - [NC,L] RewriteRule ^public/.*$ /public/index.php [NC,L]

Zend Framework Project .htaccess with exclusion of folders

Anil Konsal — Tue, 30 Aug 2011 06:05:41 +0000

Options +FollowSymLinks RewriteEngine on


RewriteRule ^\.htaccess$ - [F]
RewriteRule ^(blog|forum)($|/) - [L]
RewriteCond %{REQUEST_URI} =""

RewriteRule ^.*$ /public/index.php [NC,L]
RewriteCond %{REQUEST_URI} !^/public/.*$

RewriteRule ^(.*)$ /public/$1
RewriteCond %{REQUEST_FILENAME} -f

RewriteRule ^.*$ - [NC,L]

RewriteRule ^public/.*$ /public/index.php [NC,L]

Exporting unversioned files with SVN

Anil Konsal — Sat, 28 May 2011 05:11:46 +0000

You can just use cp -r to copy the directory tree directly, and then remove the .svn directories afterwards:
# cp -r x
# cd x
# find . -name .svn -type d -exec rm -r ‘{}’ \;

Drop Down menu hiding behind Flash in internet explorer

Anil Konsal — Fri, 20 May 2011 08:08:23 +0000

For this you have to make the flash movie transparent. set the wmode property to transparent in the flash object

Google Map Polygons draw internet explorer unspecified error

Anil Konsal — Thu, 19 May 2011 10:37:34 +0000

if you are using jQuery to initialize google Map, do not user $(function(){ initialize()}) or $(document).ready(function(){initialize()}).

Always use $(window).load(function(){ initialize() }). This worked for me.

Installing python 2.7.1, mysql-pythondb and PIL (python Imaging Library) on centos

Anil Konsal — Sat, 09 Apr 2011 12:01:29 +0000

yum -y install gcc gdbm-devel readline-devel ncurses-devel zlib-devel bzip2-develsqlite-devel db4-devel openssl-devel tk-devel bluez-libs-devel make


cd /var/tmp
wget http://www.python.org/ftp/python/2.7.1/Python-2.7.1.tgz
tar xvfz Python-2.7.1.tgz
cd Python-2.7.1
./configure --prefix=/opt/python2.7.1 --with-threads --enable-shared
make
make install

touch /etc/ld.so.conf.d/opt-python2.7.1.conf
echo "/opt/python2.7.1/lib/" >> /etc/ld.so.conf.d/opt-python2.7.1.conf
ldconfig

ln -sf /opt/python2.7.1/bin/python /usr/bin/python2.7

cd /var/tmp
wget http://pypi.python.org/packages/2.7/s/setuptools/setuptools-0.6c11-py2.7.egg
sh setuptools-0.6c11-py2.7.egg --prefix=/opt/python2.7.1

/opt/python2.7.1/bin/easy_install pip
ln -sf /opt/python2.7.1/bin/pip /usr/bin/pip

pip install virtualenv
ln -sf /opt/python2.7.1/bin/virtualenv /usr/bin/virtualenv

echo "alias python=/opt/python2.7.1/bin/python" >> ~/.bash_profile
echo "alias python2.7=/opt/python2.7.1/bin/python" >> ~/.bash_profile
echo "PATH=$PATH:/opt/python2.7.1/bin" >> ~/.bash_profile
source ~/.bash_profile

# install mysql python db
cd /var/tmp
pip install http://sourceforge.net/projects/mysql-python/files/mysql-python/1.2.3/MySQL-python-1.2.3.tar.gz/download
#install PIL
yum install libjpeg freetype

pip install http://effbot.org/downloads/Imaging-1.1.7.tar.gz

Credit card encryption and storage

Anil Konsal — Sun, 13 Mar 2011 10:50:31 +0000

Despite the recomendations of PCI DSS for not storing the credit card data in database, you have to do this because on the client’s requirements. Its quite tough decision for the developer to choose the encryption method for the credit card data.

Based on my experience I came to this point that one should leave the encryption on the DBMS used. Most of the DBMSes are capable enough to provide the strong encryption. For example, MySQL provides functions AES_ENCRYPT and AES_DECRYPT which take a secret keyphrase and envcrypt the provided data.

My experince with PHP encryption using mcrypt extension and then savin in DB has not been so smooth as some times it works but some times you get squares and diamond shaped characters when decryption takes place.