Tuesday, March 9, 2010

Play WMV in Browser

1) Replace "http://www.example.com/myfile.wmv" with your file name.
2) Replace "[" with "<"
3) Replace "]" with ">"


[object id="MediaPlayer" width=640 height=480 classid="CLSID:22D6f312-B0F6-11D0-94AB-0080C74C7E95" standby="Loading Windows Media Player components..." type="application/x-oleobject" codebase="http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=6,4,7,1112"]
[param name="filename" value="http://www.example.com/myfile.wmv"]
[param name="Showcontrols" value="True"]
[param name="autoStart" value="FALSE"]
[embed type="application/x-mplayer2" src="http://www.example.com/myfile.wmv" width=640 height=480][/embed]
[/object]

Enjoy the code

Tuesday, February 9, 2010

One to Many Relation in RDBMS single SQL to fetch data

Many times we need a single sql that fetch the data from one to many relation ship.
in mysql database we can achive this with the help of OUTER JOIN.

let say employee table having the record with emp_id and each employee have multiple contact number in table emp_contact so we fetch the record in single sql employee with there contact list.

SELECT
emp.*,
con.contact_number_list
FROM
emp
LEFT OUTER JOIN (
SELECT emp_id, GROUP_CONCAT( CAST(contact_num as CHAR ) ) as contact_number_list
FROM emp_contact
GROUP BY emp_id
) AS con ON con.emp_id = emp.emp_id

Tuesday, January 19, 2010

Magento after installtion can not able to login

Solution:
I googled and found these solutions:-

a) Use 127.0.0.1 instead of localhost in your url, i.e. using http://127.0.0.1/magento/index.php/admin instead of http://localhost/magento/index.php/admin . But this didn’t solve my problem.

b) Since I am using Linux, I was suggested to open "hosts" file from /etc/hosts and have 127.0.0.1 point to something like magento.localhost or even 127.0.0.1 point to http://www.localhost.com.
But this option i not tested.

c) This solution finally helped me out of this problem. The solution was to modify the core Magento code. Open app/code/core/Mage/Core/Model/Session/Abstract/Varien.php.
Comment out the lines 80 to 83. The line number may vary according to the Magento version. But these lines are present somewhere near line 80. You have to comment the comma (,) in line: $this->getCookie()->getPath()//,

// set session cookie params
session_set_cookie_params(
$this->getCookie()->getLifetime(),
$this->getCookie()->getPath()//,
//$this->getCookie()->getDomain(),
//$this->getCookie()->isSecure(),
//$this->getCookie()->getHttponly()
);

Magento installtion Deprecated error for php5.3

Deprecated errors

a) split is deprecated.

to override these issue please make following changes of reporting error
y:\magento\index.php in these file replace error_reporting with following one
error_reporting(E_ALL & E_STRICT & ~E_DEPRECATED);

y:\magento\downloader\Maged\Pear.php in these file replace error_reporting with following one
error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);

y:\magento\lib\Varien\Pear.php in these file replace error_reporting with following one
error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);

Saturday, January 16, 2010

Magento not working on PHP 5.3

Fatal error: Method Varien_Object::__tostring() cannot take arguments in /magento/lib/Varien/Object.php
Change 1) /lib/Varien/Object.php (Line 484)
Change from
public function ___toString(array $arrAttributes = array(), $valueSeparator=’,')
To this
public function __invoke(array $arrAttributes = array(), $valueSeparator=’,')
Change 2) File /app/code/core/Mage/Core/Controller/Request/Http.php (Line 274)
Change from
$host = split(‘:’, $_SERVER['HTTP_HOST']);
To this
$host = explode(‘:’, $_SERVER['HTTP_HOST']);

Thursday, January 14, 2010

PHP5 foreach loop using reference variable

// In PHP5 foreach loop using reference variable
// Example
$arr = array(2,3,4,5);
print_r($arr); // Array ( [0] => 2 [1] => 3 [2] => 4 [3] => 5 )
foreach ($arr as &$value) {
if($value == 4) { $value = 77; }
}
print_r($arr); // Array ( [0] => 2 [1] => 3 [2] => 77 [3] => 5 )

Wednesday, January 13, 2010

PHP Variables passed by value or by reference?

//PHP Variables passed by value or by reference?
//
//Variable is passed by value.
// for PHP5 Object passed by Reference, Object handler (Object variable) passed by // value

// for PHP4 Object passed by value, Object handler (Object variable) passed by value

//example

function test1($a) {
$a=2;
}

function test2(&$a) {
$a=2;
}

$a = 1;
echo $a; // output 1
test1($a);
echo $a; // output 1
// as variable is passed by value

//case for passed by reference
$a = 1;
echo $a; // output 1
test2($a);
echo $a; // output 2
// as variable is passed by reference

// now interesting case about objects
// in PHP 5 Object are always passed by reference
// in PHP 4 Object are passed by value
// object handler (Object variables) are passed by value
// see example
class Test {
var $strVal = 1;

function getValue() {
return $this->strVal;
}
}

function test($obj) {
echo $obj->getValue();
$obj->strVal = 2;
}

// now test cases
$obj1 = new Test();
test($obj1);
echo " ".$obj1->strVal;
// output 1 2 (In PHP5)
// output 1 1 (In PHP4)

// now explanation
// $obj1 is new object created. $obj1 is represent the handler for that new object
// test is called then handler is passed by value and object is passed by reference
// so $obj1 and $obj are object handler pointing to same object
// so you will get out put as 1 2 in PHP 5
// in case of PHP4 output will be 1 1 because object passed by values
// so $obj1 and $obj are two object handler pointing two different instances of Test class.


// now for PHP 4 if you want to pass object as reference then just changes test method as // follows
// add the & sign before parameter

function test(&$obj) {
echo $obj->getValue();
$obj->strVal = 2;
}