</div>
<div id="_mcePaste">## Add following lines, end of php.ini file ##</div>
<div id="_mcePaste"># MongoDB Driver</div>
<div id="_mcePaste">extension=mongo.so</div>
<div id="_mcePaste">

</div>
<div id="_mcePaste"><?php</div>
<div id="_mcePaste">// connect</div>
<div id="_mcePaste">$m = new Mongo();</div>
<div id="_mcePaste">// select a database</div>
<div id="_mcePaste">$db = $m->wordpress;</div>
<div id="_mcePaste">$collection = $db->wordpressapi;</div>
<div id="_mcePaste">// add an element</div>
<div id="_mcePaste">$obj = array( "title" => "Sony this Good.\n", "author" => "Wordpressapi.com" );</div>
<div id="_mcePaste">$collection->insert($obj);</div>
<div id="_mcePaste">// add another element, with a different "shape"</div>
<div id="_mcePaste">$obj = array( "title" => "Wordpressapi.com", "online" => true );</div>
<div id="_mcePaste">$collection->insert($obj);</div>
<div id="_mcePaste">// find everything in the collection</div>
<div id="_mcePaste">$cursor = $collection->find();</div>
<div id="_mcePaste">// iterate through the results</div>
<div id="_mcePaste">foreach ($cursor as $obj) {</div>
<div id="_mcePaste">echo $obj["title"] . "\n";</div>
<div id="_mcePaste">echo $obj["author"] . "\n";</div>
<div id="_mcePaste">}</div>
<div id="_mcePaste">// disconnect</div>
<div id="_mcePaste">$m->close();</div>
<div id="_mcePaste">?></div>
<div id="_mcePaste">[/php]</div>
<div id="_mcePaste">If you open this file in browser then you can see the following words in browser:</div>
<div id="_mcePaste">Sony this Good. WordPressapi.com Sony this Good. WordPressapi.com</div>
If you want to use the mongodb with php then you need to install pecl libraries. Mongo extension is not bundled with PHP.
For installing the Mongo use following URL:
If you dont have pecl installed on your linux machine then use following command.# yum install php-pecl*
then use following command# pecl install mongo
Then open the php.ini file. if you are using the linux then use following command.
# vim /etc/php.ini
[code]## Add following lines, end of php.ini file ### MongoDB Driverextension=mongo.so

Restart the apache webserver using following command
# /etc/init.d/httpd restart
If Mongodb server is running then use can test your mongodb database using following code:
Create the mongotest.php file[/code]<?php
// connect$m = new Mongo();
// select a database$db = $m->wordpress;$collection = $db->wordpressapi;
// add an element$obj = array( “title” => “Sony this Good.\n”, “author” => “WordPressapi.com” );$collection->insert($obj);
// add another element, with a different “shape”$obj = array( “title” => “WordPressapi.com”, “online” => true );$collection->insert($obj);
// find everything in the collection$cursor = $collection->find();
// iterate through the resultsforeach ($cursor as $obj) {    echo $obj["title"] . “\n”;     echo $obj["author"] . “\n”;}
// disconnect$m->close();
?>
[/php]
If you open this file in browser then you can see the following words in browser:Sony this Good. WordPressapi.com Sony this Good. WordPressapi.com

]]> http://wordpressapi.com/2010/09/09/mongodb-php/feed/ 0 http://wordpressapi.com/2010/09/09/how-to-install-mongodb-on-linux/ http://wordpressapi.com/2010/09/09/how-to-install-mongodb-on-linux/#comments Thu, 09 Sep 2010 10:25:43 +0000 Sony http://wordpressapi.com/?p=5261

</div>
<div id="_mcePaste">#!/bin/bash</div>
<div id="_mcePaste">pid=`ps -o pid,command ax | grep mongod | awk '!/awk/ && !/grep/ {print $1}'`;</div>
<div id="_mcePaste">if [ "${pid}" != "" ]; then</div>
<div id="_mcePaste">kill -2 ${pid};</div>
<div id="_mcePaste">fi</div>
<div id="_mcePaste">

</div>
<div id="_mcePaste">#!/bin/sh</div>
<div id="_mcePaste">/opt/mongodb/bin/mongod --config /opt/config/mongodb \</div>
<div id="_mcePaste">## --upgrade \ ##runs a database upgrade option if needed \</div>
<div id="_mcePaste">

</div>
<div id="_mcePaste"># Configuration Options for MongoDB</div>
<div id="_mcePaste">#</div>
<div id="_mcePaste"># For More Information, Consider:</div>
<div id="_mcePaste"># - Configuration Parameters: http://www.mongodb.org/display/DOCS/Command+Line+Parameters</div>
<div id="_mcePaste"># - File Based Configuration: http://www.mongodb.org/display/DOCS/File+Based+Configuration</div>
<div id="_mcePaste">dbpath = /srv/db/mongodb</div>
<div id="_mcePaste">logpath = /srv/db/mongodb.log</div>
<div id="_mcePaste">logappend = true</div>
<div id="_mcePaste">bind_ip = 127.0.0.1</div>
<div id="_mcePaste">port = 27017</div>
<div id="_mcePaste">fork = true</div>
<div id="_mcePaste">auth = true</div>
<div id="_mcePaste"># noauth = true</div>
<div id="_mcePaste">

</div>
<div id="_mcePaste">useradd -M -r --home-dir /opt/mongodb mongodb</div>
<div id="_mcePaste">

Before installing the Mongodb on linux box you need to install following packages on box.[root@sonyk-pc Download]# sudo yum -y install git tcsh scons gcc-c++ glibc-devel[root@sonyk-pc Download]# sudo yum -y install boost-devel pcre-devel js-devel readline-devel[root@sonyk-pc Download]# sudo yum -y install boost-devel-static readline-static ncurses-static

For 32bit user use following command[root@sonyk-pc Download]# wget http://fastdl.mongodb.org/linux/mongodb-linux-i686-1.6.2.tgz
For 64bit use following command[root@sonyk-pc Download]# wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-1.6.2.tgz

[root@sonyk-pc Download]# tar xzf mongodb-linux-i686-1.6.2.tgz [root@sonyk-pc Download]#  cd mongodb-linux-i686-1.6.2
Mongo stores database in data/db folder. so we need to create those folder using following command.
[root@sonyk-pc mongodb-linux-i686-1.6.2]# sudo mkdir -p /data/db/[root@sonyk-pc mongodb-linux-i686-1.6.2]# sudo chown `id -u` /data/db
Using following command you can start the mongo database.
[root@sonyk-pc mongodb-linux-i686-1.6.2]# ./bin/mongod./bin/mongod –help for help and startup optionsThu Sep  9 13:10:55 MongoDB starting : pid=22159 port=27017 dbpath=/data/db/ 32-bit
** NOTE: when using MongoDB 32 bit, you are limited to about 2 gigabytes of data**       see http://blog.mongodb.org/post/137788967/32-bit-limitations
Thu Sep  9 13:10:55 db version v1.6.2, pdfile version 4.5

If you want to create mongodb service in linux then use following steps:
[root@sonyk-pc Download]# wget http://fastdl.mongodb.org/linux/mongodb-linux-i686-1.6.2.tgz [root@sonyk-pc Download]# tar xzf http://fastdl.mongodb.org/linux/mongodb-linux-i686-1.6.2.tgz[root@sonyk-pc Download]# mv mongodb-linux-i686-1.6.2 /opt/mongodb[root@sonyk-pc Download]# mkdir -p /srv/db/mongodb[root@sonyk-pc Download]# touch /srv/db/mongodb.log
[root@sonyk-pc Download]# mkdir /opt/bin/[root@sonyk-pc Download]# mkdir /opt/config/
create the File: /opt/bin/mongodb-stopPut following code in that file;

#!/bin/bash
pid=`ps -o pid,command ax | grep mongod | awk '!/awk/ && !/grep/ {print $1}'`;if [ "${pid}" != "" ]; then    kill -2 ${pid};fi

create the File: /opt/bin/mongodb-startPut following code in that file:

#!/bin/sh
/opt/mongodb/bin/mongod --config /opt/config/mongodb \## --upgrade \ ##runs a database upgrade option if needed \

File: /opt/config/mongodbPut following code in that file:

# Configuration Options for MongoDB## For More Information, Consider:# - Configuration Parameters: http://www.mongodb.org/display/DOCS/Command+Line+Parameters# - File Based Configuration: http://www.mongodb.org/display/DOCS/File+Based+Configuration
dbpath = /srv/db/mongodblogpath = /srv/db/mongodb.loglogappend = true
bind_ip = 127.0.0.1port = 27017fork = true
auth = true# noauth = true

Do that file as linux executatblechmod +x /opt/bin/mongodb-startchmod +x /opt/bin/mongodb-stop

We’ve also created a very basic “init script” as a wrapper around the mongodb-start and mongo-stop scripts described above. You will still need to modify and manage the configuration of your MongoDB server in the files above. This script only provides a means for ensuring that MongoDB will start at boot. Issue the following commands:
wget http://library.linode.com/databases/mongodb/reference/init-rpm.shmv init-rpm.sh /etc/rc.d/init.d/mongodbchmod +x /etc/rc.d/init.d/mongodb /etc/init.d/mongodbchkconfig –add mongodbchkconfig –level 35 mongodb on

You will also need to create a user and group for mongodb; issue the following command:

useradd -M -r --home-dir /opt/mongodb mongodb

Now issue the following command to ensure that the MongoDB user you just created will have access to all required files in the /srv/db/ hierarchy:
chown mongodb:mongodb -R /srv/db/
To start and stop MongoDB using the init script, issue the appropriate command from the following:
/etc/init.d/mongodb start/etc/init.d/mongodb stop

For checking the web admin interface of Mongodb – listening on port 28017Check this URL : http://localhost:28017/

[root@sonyk-pc sony]# yum –enablerepo=remi install mysql-workbench
Loaded plugins: refresh-packagekit
remi | 3.0 kB 00:00
remi/primary_db | 198 kB 00:01
Setting up Install Process
Resolving Dependencies
–> Running transaction check
—> Package mysql-workbench.i586 0:5.2.26-1.fc11.remi set to be updated
–> Processing Dependency: mysql-connector-c++ >= 1.1.0-0.1.bzr888 for package: mysql-workbench-5.2.26-1.fc11.remi.i586
–> Processing Dependency: python-paramiko for package: mysql-workbench-5.2.26-1.fc11.remi.i586
–> Running transaction check
—> Package mysql-connector-c++.i586 0:1.1.0-0.1.bzr888.fc11.remi set to be updated
—> Package python-paramiko.noarch 0:1.7.5-1.fc11 set to be updated
–> Finished Dependency Resolution

Dependencies Resolved

==================================================================================================================================================================================================================================
Package Arch Version Repository Size
==================================================================================================================================================================================================================================
Installing:
mysql-workbench i586 5.2.26-1.fc11.remi remi 14 M
Installing for dependencies:
mysql-connector-c++ i586 1.1.0-0.1.bzr888.fc11.remi remi 252 k
python-paramiko noarch 1.7.5-1.fc11 updates 982 k

Transaction Summary
==================================================================================================================================================================================================================================
Install 3 Package(s)
Upgrade 0 Package(s)

Total download size: 15 M
Is this ok [y/N]: y
Downloading Packages:
(1/3): mysql-connector-c++-1.1.0-0.1.bzr888.fc11.remi.i586.rpm | 252 kB 00:03
(2/3): mysql-workbench-5.2.26-1.fc11.remi.i586.rpm | 14 MB 02:17
http://fedoramirror.hnsdc.com/updates/11/i386/python-paramiko-1.7.5-1.fc11.noarch.rpm: [Errno 14] HTTP Error 404: Not Found
Trying other mirror.
(3/3): python-paramiko-1.7.5-1.fc11.noarch.rpm | 982 kB 00:09
———————————————————————————————————————————————————————————————————————————-
Total 98 kB/s | 15 MB 02:34
warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID 00f97f56
remi/gpgkey | 1.3 kB 00:00
Importing GPG key 0x00F97F56 “Remi Collet ” from /etc/pki/rpm-gpg/RPM-GPG-KEY-remi
Is this ok [y/N]: y
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : python-paramiko-1.7.5-1.fc11.noarch 1/3
Installing : mysql-connector-c++-1.1.0-0.1.bzr888.fc11.remi.i586 2/3
Installing : mysql-workbench-5.2.26-1.fc11.remi.i586 3/3

Installed:
mysql-workbench.i586 0:5.2.26-1.fc11.remi

Dependency Installed:
mysql-connector-c++.i586 0:1.1.0-0.1.bzr888.fc11.remi python-paramiko.noarch 0:1.7.5-1.fc11

Complete!
[root@sonyk-pc sony]#

After installation you will find the mysql workbench under application-> programming  menu

After that you will you will see the following screen.

clicking on new connection you can create the new connections and after that If you want to create the ER diagram then go to database Option and reverse engineering.

Using following article You can find the largest tables from Mysql database.

Finding largest tables on MySQL instance is no brainier in MySQL 5.0+ thanks to Information Schema but I still wanted to post little query I use for the purpose so I can easily find it later, plus it is quite handy in a way it presents information:

I do some converting and rounding to see number of rows in millions and data and index size in GB so I can save on counting zeros.
The last column shows how much does the index take compared to the data which is mainly for informational purposes but for MyISAM can also help you to size your key buffer compared to operating system cache.

I also use it to see which tables may be worth to review in terms of indexes. Large index size compared to data size often indicates there is a lot of indexes (so it is well possible there are some duplicates, redundant or simply unused indexes among them) or may be there is long primary key with Innodb tables. Of course it also could be perfectly fine tables but it is worth to look.

Changing the query a bit to look for different sorting order or extra data – such as average row length you can learn quite a lot about your schema this way.

It is also worth to note queries on information_schema can be rather slow if you have a lot of large tables. On this instance it took 2.5 minutes to run for 450 tables.

UPDATE: To make things easier I’ve added INFORMATION_SCHEMA to the query so it works whatever database you have active. It does not work with MySQL before 5.0 still of course

In linux go to /var/lib/mysql path

In that folder each folder means seprate database.

Copy that all folders to your local machine.
again go to your mysql local installtion and paste that folder into your mysql folder.

For in each database folder file you will find follwoing types of files in the folder
db.opt
test.frm
test.MYD
test.MYI

just copy and paste in your system

Multi level unique is very important feature in mysql. This feature is present all databases. Using this composite unique key we can achieve multilevel uniqueness.

Here I am going to give you how to create the composite unique key in mysql.

mysql> alter table `user` add unique `DATE_uuid` (`date`, `uuid`)

how to check indexes on table
mysql> show index from user;
+—————-+————+————+————–+————-+———–+————-+———-+——–+——+————+———+
| Table          | Non_unique | Key_name   | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment |
+—————-+————+————+————–+————-+———–+————-+———-+——–+——+————+———+
| user |          0 | PRIMARY    |            1 | user_id         | A         |           0 |     NULL | NULL   |      | BTREE      |         |
| user |          0 | DATE_uuid |            1 | date        | A         |        NULL |     NULL | NULL   |      | BTREE      |         |
| user |          0 | DATE_uuid |            2 | uuid       | A         |           0 |     NULL | NULL   |      | BTREE      |         |
+—————-+————+————+————–+————-+———–+————-+———-+——–+——+————+———+
3 rows in set (0.01 sec)

mysql>

Using array we can achive so many things and array is useful for so many times when we do programming.
In this article I am going to share some method about PHP array.

What is PHP array?
An array in PHP is actually an ordered map. A map is a type that associates values to keys. This type is optimized for several different uses; it can be treated as an array, list (vector), hash table (an implementation of a map), dictionary, collection, stack, queue, and probably more. As array values can be other arrays, trees and multidimensional arrays are also possible.

Following is syntax
array(key => value)

Creating PHP array:

<?php
$arr = array("str_arr" => "this is string", 25 => true);

echo $arr["str_arr"]; // print this is string
echo $arr[25];    // print ture
?>

How to print direct PHP array.

<?php
$arr=array("a"=>"jimi","b"=>"timi","c"=>"limi");
print_r($arr);
?>

How to print PHP array preformated

<?php
$arr=array("a"=>"jimi","b"=>"timi","c"=>"limi");
print_r("<pre>".$arr);
?>

How to create a two-dimensional PHP array

<?php
$arr = array (
 "fruits"  => array("a" => "orange", "b" => "banana", "c" => "apple"),
 "numbers" => array(1, 2, 3, 4, 5, 6),
 "holes"   => array("first", 5 => "second", "third")
);
print_r("<pre>".$arr);
?>

How to create an array from MySql table

<?
function cre_array($row) {
 foreach($row as $key => $value) {
 global $$key;
 $$key = $value;
 }
}

//User table has first_name field present.

$sql = mysql_query("SELECT * FROM 'users'");
while ($row = mysql_fetch_assoc($sql)) {
 cre_array($row);
 echo $first_name.'<br>'; //instead of $row['first_name']
}

?>

How to count PHP array count

$fruits = array("a" => "orange", "b" => "banana", "c" => "apple");
echo sizeof($fruits);
echo $arrayLength = count($fruits);

PHP and MySql and Array

<?php
$sql = "SELECT key,value FROM table";
$result = mysql_query($sql);
while($row = mysql_fetch_row($result)) {
$myArray[$row[0]] = $row[1];
}

while(list($key,$value) = each($myArray)) {
echo "$key : $value";
}
?>

Following image will help you to understand two dimensional array.

/usr/bin/ruby extconf.rb
checking for mysql_ssl_set()… yes
checking for rb_str_set_len()… no
checking for rb_thread_start_timer()… yes
checking for mysql.h… no
checking for mysql/mysql.h… no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers. Check the mkmf.log file for more
details. You may need configuration options.

Provided configuration options:
–with-opt-dir
–without-opt-dir
–with-opt-include
–without-opt-include=${opt-dir}/include
–with-opt-lib
–without-opt-lib=${opt-dir}/lib
–with-make-prog
–without-make-prog
–srcdir=.
–curdir
–ruby=/usr/bin/ruby
–with-mysql-config
–without-mysql-config

Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/mysql-2.8.1 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/mysql-2.8.1/ext/mysql_api/gem_make.out

To find the mysql path on machine used following command
[root@localhost siwan]# which mysql
/usr/bin/mysql

I tried following command:
[root@localhost siwan]# sudo gem install mysql — –with-mysql-dir=/usr/bin/mysql

I Got the same error

[root@localhost siwan]# sudo gem install mysql — –with-mysql-dir=/usr/bin/mysql
Building native extensions. This could take a while…
ERROR: Error installing mysql:
ERROR: Failed to build gem native extension.

/usr/bin/ruby extconf.rb
checking for mysql_ssl_set()… yes
checking for rb_str_set_len()… no
checking for rb_thread_start_timer()… yes
checking for mysql.h… no
checking for mysql/mysql.h… no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers. Check the mkmf.log file for more
details. You may need configuration options.

Provided configuration options:
–with-opt-dir
–without-opt-dir
–with-opt-include
–without-opt-include=${opt-dir}/include
–with-opt-lib
–without-opt-lib=${opt-dir}/lib
–with-make-prog
–without-make-prog
–srcdir=.
–curdir
–ruby=/usr/bin/ruby
–with-mysql-config
–without-mysql-config

Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/mysql-2.8.1 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/mysql-2.8.1/ext/mysql_api/gem_make.out
ERROR: could not find gem — locally or in a repository
ERROR: could not find gem –with-mysql-dir=/usr/bin/mysql locally or in a repository

Then I checked the mysql-devel
[root@localhost siwan]# yum list mysql-devel
Loaded plugins: refresh-packagekit
Available Packages
mysql-devel.i586 5.1.37-1.fc11 updates

Then I Installed the mysql-devel
[root@localhost siwan]# yum install mysql-devel
Installed:
mysql-devel.i586 0:5.1.37-1.fc11
Complete!

Then I tried the mysql Gem installing…..I am able to install the mysql gem…
[root@localhost siwan]# gem install mysql
Building native extensions. This could take a while…
Successfully installed mysql-2.8.1
1 gem installed
Installing ri documentation for mysql-2.8.1…
Installing RDoc documentation for mysql-2.8.1…
[root@localhost siwan]#

You are able to start your applicaton at http://127.0.0.1:3000, http://127.0.0.1:3001 and http://127.0.0.1:3002

for all the cluster
# mongrel_rails cluster::stop

Advanced prepairation for production realeaze
$ mkdir /etc/mongrel_cluster

#vim /etc/mongrel_cluster/project_name.yml
copy and paste following text;
user: project_name
cwd: //home/siwan/project_name
log_file: /home/siwan/project_name/mongrel.log
port: “3000″
environment: production
group: dev
address: localhost
pid_file: /home/siwan/project_name/tmp/pids/mongrel.pid
servers: 3

or you can run the following command

or copy and paste the content from config/mongrel_cluster.yml file to /etc/mongrel_cluster/project_name.yml

# ln -s /home/siwan/project_name/config/mongrel_cluster.yml /etc/mongrel_cluster/project_name.yml

Then open your httpd.conf file for apache configration:

<Proxy balancer://project_name>
BalancerMember http://127.0.0.1:3000
BalancerMember http://127.0.0.1:3001
BalancerMember http://127.0.0.1:3002
</Proxy>

<VirtualHost *:80>
ProxyPreserveHost On
# Avoid open you server to proxying
ProxyRequests Off
# Options +FollowSymLinks
RewriteEngine On

RewriteRule ^/(images|stylesheet|javascript|html)/?(.*) /home/siwan/project_name/public/$0 [L]
ServerAdmin siwan@yahoo.co.in
DocumentRoot /home/project_name/
ServerName example.com
RewriteRule  ^/(.*)$  balancer://project_name%{REQUEST_URI} [P,QSA,L]
</VirtualHost>

Restart the apache server
#/etc/init.d/httpd restart

Command for restart the mongrel servers from any where
# mongrel_rails cluster::restart -C /etc/mongrel_cluster/project_name.yml

http://rpm.pbone.net/index.php3/stat/4/idpl/7221422/com/mysql-connector-java-3.1.12-5.fc9.i386.rpm.html

If you are using the fedora 10 or 11, you can use this url;

http://www.rpmfind.net/linux/rpm2html/search.php?query=mysql-connector-java&submit=Search+…&system=fedora+9&arch=

[siwan@localhost ]$ su
Password:
[root@localhost ]# rpm -Uvh mysql-connector-java-3.1.12-5.fc9.i386.rpm
Preparing… ########################################### [100%]
1:mysql-connector-java ########################################### [100%]
[root@localhost ]#

how to install mysql-connector-odbc on fedora

I downloaded rmp file from this location.

http://rpm.pbone.net/index.php3?stat=3&search=mysql-connector-odbc&srodzaj=3

[root@localhost Desktop]# rpm -Uvh mysql-connector-odbc-3.51.24r1071-1.fc9.i386.rpm
Preparing… ########################################### [100%]
1:mysql-connector-odbc ########################################### [100%]
[root@localhost Desktop]#

SHOW TABLE STATUS WHERE Name = ‘users’;

Or Use this command for checking the all table’s engine type.

SHOW TABLE STATUS;

Or You can use this command for database:

mysqlshow –status db_name;

I used following URL for creating this commands:

http://dev.mysql.com/doc/refman/4.1/en/show-table-status.html

5 SHOW TABLE STATUS WHERE Name = 'xxx'

<?php

// We'll be outputting a PDF
header('Content-type: text/xml');

echo "”

$db_name = “testDB”;
$connection = mysql_connect(“example.com”, “username”, “password”) or die(“Could not connect.”);
$table_name = ‘user’;

$query = “select * from ” . $table_name;

$result = mysql_query($query, $connection) or die(“Could not complete database query”);
$num = mysql_num_rows($result);

while ($row = mysql_fetch_assoc($result)) {
echo “”. $row['firstname'].”";
echo “”. $row['lastname'].”";
echo “

“;
echo “”. $row['age'].”";
}

?>

When started working on WordPress blog Plugins, Themes. Then I got to know about this error.
Whenever you mis-configured the wp-config.php file. You will this kind of error.

You need to Fill following information correctly:(dont forget to create database your own)
** The name of the database for WordPress */

define(‘DB_NAME’, ‘wordpress’);

/** MySQL database username */

define(‘DB_USER’, ‘root’);

/** MySQL database password */

define(‘DB_PASSWORD’, ”);

/** MySQL hostname */

define(‘DB_HOST’, ‘localhost’);

This will solve your problem.

How i can get ip address – REMOTE_ADDR – the IP address of the client
REMOTE_HOST – the host address of the client, if available

What is the difference between echo and print statement? – echo() can take multiple expressions,Print cannot take multiple expressions.
echo has the slight performance advantage because it doesn’t have a return value.
True, echo is a little bit faster.

How we know browser properties -echo $_SERVER['HTTP_USER_AGENT'] . “<hr /> “;
$browser = get_browser();
foreach ($browser as $name => $value) {
echo “<b>$name</b> $value <br /> “;
}

How i will check that user is, logged in or not. i want to make it a function and i want to use in each page and after login i want to go in current page(same page. where i was working)

What is difference between require_once(), require(), include(). Becouse above three function usely use to call a file in another file.
Difference between require() and require_once(): require() includes and evaluates a specific file, while require_once() does that only if it has not been included before (on the same page).
So, require_once() is recommended to use when you want to include a file where you have a lot of functions for example. This way you make sure you don’t include the file more times and you will not get the “function re-declared” error.
Difference between require() and include() is that require() produces a FATAL ERROR if the file you want to include is not found, while include() only produces a WARNING.
There is also include_once() which is the same as include(), but the difference between them is the same as the difference between require() and require_once().

How do I generate a random number from-php?
srand((double)microtime()*1000000);
echo rand(0,100);

How do I set the browser timeout?
set_time_limit(900);
this sets the timeout too 900 seconds / 15 minutes.

How can I do error handling in php?

Is it possible to connect to a ftp server with php?
Yes it is possible, you can use the ftp_connect function. (PHP 3>= 3.0.13, PHP 4 >= 4.0b4)

How do I find out how a user came to my page?
You have the variable $HTTP_REFERER which holds the page that refered to you page, if there are any referer, ie if the user enters your url directly the referer variable will be empty.

How can I add text to an image?
array imagettftext ( resource $image, float $size, float $angle, int $x, int $y, int $color, string $fontfile, string $text )
how to rotate an image using php code?
$move90 = imagerotate($myimage,90);
//$myimage is the reference to the loaded image, eg through imagecreatefromjpeg

How do I find the size of an array? –use Count function
$values = range(“A”,”Z”);
echo count($values);

How do I remove escape characters from data?
$data = “I\’m the king of the castle”;
echo stripslashes($data); //I’m the king of the castle

What are magic quotes?
Magic quotes is a configuration setting within PHP that means that all data containing a single or double quote, or NUL, will automatically be escaped with a backslash before being entered into a database.

How can we encrypt the username and password using PHP?

What is the difference between $message and $$message?
$message is a simple variable whereas $$message is a reference variable.

What are the differences between DROP a table and TRUNCATE a table?

What’s the difference between md5(), crc32() and sha1() crypto on PHP?
The major difference is the length of the hash generated. CRC32 is, evidently, 32 bits, while sha1() returns a 128 bit value, and md5() returns a 160 bit value. This is important when avoiding collisions.

How to set cookies?
setcookie(’variable’,’value’,’time’)
;

>mysqldump -uroot -p --all-databases >> all_database_dump.sql;

for single database

mysqldump -uroot -p public_wordpressmu wp_1_posts > one.sql

database import from sql file

mysql –verbose -uroot -p public_wordpressmu wp_1_posts < one.sql

Creating Trigger

create trigger
DROP TRIGGER wordpress.after_wp_1_post_update;

delimiter //

CREATE TRIGGER wordpressmu.after_wp_1_post_update

AFTER UPDATE ON wordpressmu.wp_1_posts

FOR EACH ROW

IF new.post_status = ‘publish’ THEN

INSERT INTO .article_posts (id,ref_id, title, status,
comments_on, created_at, updated_at) values (new.id,new.id,
new.post_title, new.post_status, 1, new.post_date, new.post_date);

END IF;

//

delimiter ;

Insert from different table (migration)

INSERT INTO database_anme.TableName(id, ref_id, title, status, comments_on, created_at, updated_at) select id, id, post_title, post_status, 1, post_date,post_date from wordpress.wp_1_posts

Update multiple rows in through Sql query

Update user set status=”ok” where id in (2 ,3 ,4 ,5,6)

changing all post path and image path
UPDATE wp_1_posts SET post_content = REPLACE(post_content, ‘test.siwan.com’, ‘www.siwan.com’);

WordPress -fetching category through sql queryfrom post

SELECT wp_1_term_taxonomy.taxonomy, wp_1_term_relationships.object_id, wp_1_terms.name, wp_1_posts.post_title
FROM wp_1_posts INNER JOIN ((wp_1_terms INNER JOIN wp_1_term_taxonomy ON wp_1_terms.term_id = wp_1_term_taxonomy.term_id) INNER JOIN wp_1_term_relationships ON wp_1_term_taxonomy.term_taxonomy_id = wp_1_term_relationships.term_taxonomy_id) ON wp_1_posts.ID = wp_1_term_relationships.object_id
WHERE wp_1_term_taxonomy.taxonomy=’category’ and wp_1_term_relationships.object_id=’217′
ORDER BY wp_1_term_relationships.object_id ;

The SHOW statement can be used to obtain information about several aspects of your databases and tables:

• List the databases managed by the server:

  SHOW DATABASES;

• List the tables in the current database or in a given database:

  SHOW TABLES;
  SHOW TABLES FROM db_name;

• Note that SHOW TABLES doesn’t show TEMPORARY tables.
• Display information about columns or indexes in a table:

  SHOW COLUMNS FROM tbl_name;
  SHOW INDEX FROM tbl_name;

• The DESCRIBE tbl_name and EXPLAIN tbl_name statements are synonymous with SHOW COLUMNS FROM tbl_name.
• Display descriptive information about tables in the current database or in a given database:

  SHOW TABLE STATUS;
  SHOW TABLE STATUS FROM db_name;

• This statement was introduced in MySQL 3.23.0.
• Display the CREATE TABLE statement that corresponds to the current structure of a table:

  SHOW CREATE TABLE tbl_name;

• This statement was introduced in MySQL 3.23.20.

Several forms of SHOW take a LIKE 'pat' clause allowing a pattern to be given that limits the scope of the output. 'pat' is interpreted as a SQL pattern that can include the ‘%‘ and ‘_‘ wildcard characters. For example, the following statement displays the names of tables in the current database that begin with 'geo':

SHOW TABLES LIKE 'geo%';

To match a literal instance of a wildcard character in a LIKE pattern, precede it with a backslash. Generally, this is done to match a literal ‘_‘, which occurs frequently in database, table, and column names.

The mysqlshow command provides some of the same information as the SHOW statement, which allows you to get database and table information from the shell:

• List databases managed by the server:

  % mysqlshow

• List tables in the named database:

  % mysqlshow db_name

• Display information about columns in the named table:

  % mysqlshow db_name tbl_name

• Display information about indexes in the named table:

  % mysqlshow --keys db_name tbl_name

• Display descriptive information about tables in the named database:

  % mysqlshow --status db_name

The mysqldump utility allows you to see the structure of your tables in the form of a CREATE TABLE statement (much like SHOW CREATE TABLE). When using mysqldump to review table structure, be sure to invoke it with the --no-data option so that you don’t get swamped with your table’s data!

% mysqldump --no-data db_name tbl_name

If you omit the table name, mysqldump displays the structure for all tables in the database.

For both mysqlshow and mysqldump, you can specify the usual connection parameter options (such as --host or --user.)

Determining Which Table Types Your Server Supports

ISAM is the only type available before MySQL 3.23. From 3.23 on, MyISAM, MERGE, and HEAP are always available, and availability of the other types can be assessed by means of an appropriate SHOW VARIABLES statement:

SHOW VARIABLES LIKE 'have_isam';
SHOW VARIABLES LIKE 'have_bdb';
SHOW VARIABLES LIKE 'have_inno%';

If the output from the query shows that the variable has a value of YES, the corresponding table handler is enabled. If the value is something else or there is no output, the handler is unavailable. The use of the pattern have_inno% to determine InnoDB availability matches both have_innodb and have_innobase. (The latter form was used in MySQL 3.23.30 to 3.23.36 before being renamed to have_innodb.)

You can use table type information to determine whether your server supports transactions. BDB and InnoDB are the two transaction-safe table types, so check whether their handlers are enabled as described in the preceding discussion.

As of MySQL 4.1, the list of table types is available directly through the SHOW TABLE TYPES statement:

mysql> SHOW TABLE TYPES;
+--------+---------+-----------------------------------------------------------+
| Type   | Support | Comment                                                   |
+--------+---------+-----------------------------------------------------------+
| MyISAM | DEFAULT | Default type from 3.23 with great performance             |
| HEAP   | YES     | Hash based, stored in memory, useful for temporary tables |
| MERGE  | YES     | Collection of identical MyISAM tables                     |
| ISAM   | YES     | Obsolete table type; Is replaced by MyISAM                |
| InnoDB | YES     | Supports transactions, row-level locking and foreign keys |
| BDB    | YES     | Supports transactions and page-level locking              |
+--------+---------+-----------------------------------------------------------+

The Support value is YES or NO to indicate that the handler is or is not available, DISABLED if the handler is present but turned off, or DEFAULT for the table type that the server uses by default. The handler designated as DEFAULT should be considered available.

Checking a Table’s Existence or Type

It’s sometimes useful to be able to tell from within an application whether or not a given table exists. You can use SHOW TABLES to find out:

SHOW TABLES LIKE 'tbl_name';
SHOW TABLES FROM db_name LIKE 'tbl_name';

If the SHOW statement lists information for the table, it exists. It’s also possible to determine table existence with either of the following statements:

SELECT COUNT(*) FROM tbl_name;
SELECT * FROM tbl_name WHERE 0;

Each statement succeeds if the table exists and fails if it doesn’t. The first statement is most appropriate for MyISAM and ISAM tables, for which COUNT(*) with no WHERE clause is highly optimized. (It’s not so good for InnoDB or BDB tables, which require a full scan to count the rows.) The second statement is more general because is runs quickly for any table type. Use of these queries is most suitable for use within application programming languages, such as Perl or PHP, because you can test the success or failure of the query and take action accordingly. They’re not especially useful in a batch script that you run from mysql because you can’t do anything if an error occurs except terminate (or ignore the error, but then there’s obviously no point in running the query at all).

To determine the type of a table, you can use SHOW TABLE STATUS as of MySQL 3.23.0 or SHOW CREATE TABLE as of MySQL 3.23.20. The output from both statements includes a table type indicator. For versions older than 3.23.0, neither statement is available; but then the only available table type is ISAM, so there is no ambiguity about what storage format your tables use.

mysql> SHOW TABLE TYPES;
+--------+---------+-----------------------------------------------------------+
| Type   | Support | Comment                                                   |
+--------+---------+-----------------------------------------------------------+
| MyISAM | DEFAULT | Default type from 3.23 with great performance             |
| HEAP   | YES     | Hash based, stored in memory, useful for temporary tables |
| MERGE  | YES     | Collection of identical MyISAM tables                     |
| ISAM   | YES     | Obsolete table type; Is replaced by MyISAM                |
| InnoDB | YES     | Supports transactions, row-level locking and foreign keys |
| BDB    | YES     | Supports transactions and page-level locking              |
+--------+---------+-----------------------------------------------------------+