cloning a specific branch git branch

To clone a specific remote branch into our local machine, we need to write the below command:

git clone -b  

See the book OpenCart 1.4 Template Design Cookbook.
See the book Joomla Mobile Development Beginners Guide

Call-time pass-by-reference has been deprecated

While working on a drupal project, I have come across the following error:

Call-time pass-by-reference has been deprecated

To solve this problem, just replace the call by references with call by value, like &$varriable name with $variable name in the function that was named in the error block.
See the book OpenCart 1.4 Template Design Cookbook.
See the book Joomla Mobile Development Beginners Guide

URL rewrite in nginx

In this article, we will see how to rewrite urls in nginx. In the server tag, we will use the attribute server_name and rewrite urls for our redirection. We need to use two server blocks for this purpose.
Here we are going to rewrite all our www.example.com urls to example.com. In the first server block, we will write the rewrite code for www.example.com. We need to use 'http://' otherwise, it will fall into infinite loop and show 414 error.
In our second server block, we will write server configuration code for example.com.

server {
    server_name  www.example.com;
    rewrite ^(.*) http://example.com$1 permanent;
}

server {
    server_name  example.com;
    Put here your domain hosting configuration.
}

See the book OpenCart 1.4 Template Design Cookbook.
See the book Joomla Mobile Development Beginners Guide

Logrotate for nginx

To create a logrotate file for nginx server, we need to change the post rotate command to restart the nginx server. we will kill the nginx process for this purpose.

/home/shared/log/*log{
        rotate 2
        daily
        size 10k
        compress
        delaycompress
        sharedscripts
      postrotate
            [ ! -f /var/run/nginx.pid ] || kill -USR1 `cat /var/run/nginx.pid`
    endscript
}

See the book OpenCart 1.4 Template Design Cookbook.
See the book Joomla Mobile Development Beginners Guide

how to use timestamp data type in more than two columns in mysql

If you use phpmyadmin and want to have two columns that hold timestamp fields, it will give you an error. We can't add more then one field as timestamp value.
Sometime, we have created_at and updated_at fields which might be timestamp column. To add these two columns as timestamp, we have alter table structure and run the following sql command:

ALTER TABLE customer_info CHANGE created_at created_at TIMESTAMP NOT NULL DEFAULT 0,
CHANGE  `updated_at`  `updated_at` TIMESTAMP ON UPDATE CURRENT_TIMESTAMP NOT NULL;

At first, we set the default value of the first timestamp column as zero and set the current timestamp on second timestamp column.

See the book OpenCart 1.4 Template Design Cookbook.
See the book Joomla Mobile Development Beginners Guide