mysql

Multiple PHP Instances With One Apache

Wednesday, September 2nd, 2009 | Coding | No Comments

Long-winded Introduction

It took me a couple of days to figure this out due to lack of decent tutorials and not enough confidence in my Linux skills to build programs from source. I think I have the hang of it now, and write this up with the intent on providing another, or the only, tutorial on setting up CentOS 5 with multiple instances of PHP using one Apache install. That being said, there are a number of good tutorials out there, just none of them explicitly for CentOS and some leave out some details that n00bs like me get confused about.

PHP4 and PHP5 on SuSE 10.1 – This was by far the most helpful of the tutorials. Even though it was written for SuSE, it works almost straight across for CentOS.

There is also a great list of instructions in the comments on the php.net site under installing PHP for Apache 2.0 on Unix systems (see http://www.php.net/manual/en/install.unix.apache2.php#90478).

I found this one after I wrote up this tutorial at http://cuadradevelopment.com. It’s a bit different, but should work as well.

There are basically two different ways I could have done this. 1- run a single instance of Apache, and run one instance of PHP as a module, and other installs as CGI. 2- run several instances of Apache, each with it’s own instance of PHP as a module. I chose to do the first method for no particular reason. Dreamhost has a post about the good and bad with running PHP as CGI.

So basically, the steps are: 1. Set up Apache and have PHP install as a module. 2. Configure and make another instance of PHP to run as CGI. 3. Add a virtual host to Apache running under a different port to access the PHP as CGI.
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Tabledump

Wednesday, September 5th, 2007 | computer history | 1 Comment

I had the need once again to dump only certain tables from a database, instead of all 100+ tables. This was where I had a database with about 5-8 wordpress installs. I wanted to backup all of the tables for only one install. There is a way with mysqldump to do this, by listing out all of the tables you want to dump. So I just wrote a bash script to take care of making the list of tables to dump.

It has an array of database table names (without the common prefix) in the script. Then it prompts for the mysql user, database, and prefix. It could be changed to prompt for a file that contains a list or array of table names.

Anyhow, here it is for anyone’s use:

#!/bin/bash

#—————————————–#
#           Ammon Shepherd                #
#              09.05.07                   #
#  Dump a database with only the tables   #
#   containing the prefix given.          #
#—————————————–#

echo "This will dump just the tables with the specified prefix from the specified database."

echo -n "Enter the database name: "
read dbase

echo -n "Enter the table prefix: "
read prefix

echo -n "The mysql user: "
read sqluser
echo -n "The mysql pass: "
read -s sqlpass

# Get list of tables with the desired prefix
list=( $(mysql -u$sqluser -p$sqlpass $dbase –raw –silent –silent –execute="SHOW TABLES;") )

for tablename in ${list[@]}
do
    if [[ "$tablename" =~ $prefix ]]; then
        tablelist+="$tablename "
    fi
done

`mysqldump -u$sqluser -p$sqlpass –opt $dbase $tablelist > $dbase.$prefix.bak.sql`

echo

exit 0

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