Port php mysql scripts to php 7.0 from 5.x version

Recently I got a script or series of scripts that were written for PHP 5.6x and hence used mysql_connect which as you know by now does not work with PHP 7.0. Since there were number of scripts, I thought it would be waste of time to change them manually and wrote a script to fix them. If you have similar situation then probably this few lines could help you.

Since my scripts did not use all the functions so I did not put the sed commands for all of them but you get the idea 🙂

#!/bin/bash - 
#===============================================================================
#
#          FILE: fix_mysql.sh
# 
#         USAGE: ./fix_mysql.sh 
# 
#   DESCRIPTION: 
# 
#       OPTIONS: ---
#  REQUIREMENTS: ---
#          BUGS: ---
#         NOTES: ---
#        AUTHOR: Amit Agarwal (aka), 
#  ORGANIZATION: 
#       CREATED: 03/23/2018 16:35
# Last modified: Fri Mar 23, 2018  04:36PM
#      REVISION:  ---
#===============================================================================

set -o nounset                              # Treat unset variables as an error


### Run as 
#### find . -type f -name \*php -exec ~/fixmysql.sh {} \;

####

# mysql_affected_rows -> mysqli_affected_rows($link)
# mysql_close -> mysqli_close($link)
# mysql_data_seek -> mysqli_data_seek( $result, $offset)
# mysql_errno -> mysqli_errno( $link)
# mysql_error -> mysqli_error( $link)
# mysql_fetch_array -> mysqli_fetch_array( $result, $type)
# mysql_fetch_assoc -> mysqli_fetch_assoc( $result)
# mysql_fetch_lengths -> mysqli_fetch_lengths( $result )
# mysql_fetch_object -> mysqli_fetch_object( $result, $class, $params)
# mysql_fetch_row -> mysqli_fetch_row( $result)
# mysql_field_seek -> mysqli_field_seek( $result, $number)
# mysql_free_result -> mysqli_free_result(result)
# mysql_get_client_info -> mysqli_get_client_info( $link)
# mysql_get_host_info -> mysqli_get_host_info( $link)
# mysql_get_proto_info -> mysqli_get_proto_info( $link)
# mysql_get_server_info -> mysqli_get_server_info( $link)
# mysql_info -> mysqli_info( $link)
# mysql_insert_id -> mysqli_insert_id( $link)
# mysql_num_rows ->  mysqli_num_rows( $result)
# mysql_ping -> mysqli_ping( $link)
# mysql_query -> mysqli_query( $link, $query)
# mysql_real_escape_string -> mysqli_real_escape_string( $link)
# mysql_select_db - > mysqli_select_db( $link, $database)
# mysql_set_charset -> mysqli_set_charset( $link, $charset)
# mysql_stat -> mysqli_stat( $link)
# mysql_thread_id -> mysqli_thread_id( $link)
######


file=$1
sed -i 's/mysql_connect/mysqli_connect/g' $file
sed -i 's/mysql_query(/mysqli_query($con,/g' $file
sed -i 's/mysql_error/mysqli_error/g' $file
sed -i 's/mysql_select_db(/mysqli_select_db($con,/g' $file
sed -i 's/mysql_affected_rows/mysqli_affected_rows($con,/' $file
sed -i 's/mysql_escape_string(/mysqli_escape_string($con/' $file 
sed -i 's/mysql_real_escape_string(/mysqli_real_escape_string($con/' $file 
sed -i 's/mysql_fetch_array/mysqli_fetch_array/g' $file
sed -i 's/mysql_fetch_assoc/mysqli_fetch_assoc/g' $file
sed -i 's/mysql_fetch_row/mysqli_fetch_row/g' $file
sed -i 's/mysql_select_db/mysqli_select_db/g' $file

send mail using telnet from script

If you have no other option but to use telnet with authentication to send mail 🙂

 ( echo "ehlo"
sleep 1
auth login
sleep 1
$(echo username |base64)
sleep 1
$(echo password |base64)
sleep 1
mail from: from-address
sleep 1
rcpt to: recepient
sleep 1
data
sleep 1
subject: test 
test mail
. 

exit ) |telnet server port

ansible with docker dynamic inventory

So, I have a few dockers. Every now and then I want to run some command on all of them. Doing ‘docker exec’ is tiresome. I found this neat solution with ansible that I thought I should share with you.

To get started, you need to have the “docker.py” script. This script will be used as python script inventory for ansible. So, use the following command and get the script:

curl 'https://raw.githubusercontent.com/ansible/ansible/devel/contrib/inventory/docker.py' -o docker.p

Once done, check that all is well, with :

python docker.py

You should not get any errors or warnings and see a list of dockers running on your host. If you get error for docker-py then you can install the same with :

pip install docker-py

And now is the good time to open the docker.py script to check the documentation. It adds all the docker hosts as entry in itself. But cool  thing I liked is the fact that it creates a group for all running dockers – which is very very useful.

 

Now, if I want to set the Timezone (TZ) on all the running dockers in one go, I can do this:

ansible -i docker.py -m shell -a 'rm -f /etc/localtime; ln -s /usr/share/zoneinfo/Asia/Kolkata /etc/localtime' running

And just in case, the above does not work for you and you have a common username/password on all the machines, then another thing you would love is following:

# Export the docker host. If that is localhost, then you do not need this.
export DOCKER_HOST=tcp://192.168.122.1:4243
# This is GOOD to set option. This is the default IP address for docker
# and setting this to first IP address of the docker network is good idea
# that would ensure that ansible can login to each docker.
# And note - you need to have ssh running on all the dockers for the commands to work
export DOCKER_DEFAULT_IP=192.168.122.1
ansible -i docker.py -m setup -u root  -a 'filter=ansible_eth[0-2]'  all