8956860531

Am I speaking to .... ?
Hi I'm calling from
Is it right time to start interview? can we start? ur resume is in front of me u r from ... right? but we are based in pune, r u ready to move here how many companies u have worked in till now? then why would u like to switch?

so far u have worked in (number) projects were they all in core php? if not then in what other framework? then ask about that framework so u have experiance in oop then ask oop questions then go to php questions then go to my sql then js

I think thats all we need our hr will get back to u with the decision/result but before that may i know ur current ctc and expected ctc? and is it negotiable?

PHP:
1) What is use of header() function in php ?
The header() function sends a raw HTTP header to a client.We can use herder() function for redirection of pages. It is important to notice that header() must be called before any actual output is seen..
2) what does the error message "header already sent" mean?
Ques: 10 How we can upload videos using PHP?
Ans:
When want to upload videos using PHP we should follow these steps:
1.first you have to encrypt the the file which you want to upload by using "multipart-form-data" to get the $_FILES in the form submition.
2.After getting the $_FILES['tmp_name'] in the submition
3.By using move_uploaded_file (tmp_location,destination) function in PHP we can move the file from original location.

3) What is the difference between $name and $$name?
$name is variable where as $$name is reference variable like $name=sonia and $$name=singh so $sonia value is singh.

4) What are the differences between require and include?
Both include and require used to include a file but when included file not found
Include send Warning where as Require send Fatal Error .

5) Can we use include ("xyz.PHP") two times in a PHP page "index.PHP"?
Yes we can use include("xyz.php") more than one time in any page. but it create a prob when xyz.php file contain some funtions declaration then error will come for already declared function in this file else not a prob like if you want to show same content two time in page then must incude it two time not a prob

7)How we get IP address of client, previous reference page etc ? By using $_SERVER['REMOTE_ADDR'],$_SERVER['HTTP_REFERER'] etc

How can we get second of the current time using date function?
$second = date("s");

Ques: 8 What function we used to change timezone from one to another ?
Ans:
I have given you a function using them we can change a timezone into another timezone. date_default_timezone_set() function
Example:
date_default_timezone_set('India');
And we use date_default_timezone_get() function to get the entered date.

8)What are the reasons for selecting lamp (Linux, apache, MySQL,
PHP) instead of combination of other software programs, servers and operating systems?
All of those are open source resource. Security of Linux is very very more than windows. Apache is a better server that IIS both in functionality and security. MySQL is world most popular open source database. PHP is more faster that asp or any other scripting language.

9) What is the role of ob_start in php?
This function will turn output buffering on. While output buffering is active no output is sent from the script (other than headers), instead the output is stored in an internal buffer. http://php.net/manual/en/function.ob-start.php 10) What is the difference between break and continue statement? break ends a loop completely, continue just shortcuts the current iteration and moves on to the next iteration.

http://stackoverflow.com/questions/4364757/difference-between-break-and-continue-in-php

http://php.net/manual/en/control-structures.continue.php continue 0; and continue 1; is the same as running continue;.

11) Can we give parameter to continue()? continue accepts an optional numeric argument which tells it how many levels of enclosing loops it should skip to the end of.

What is the difference between the functions unlink and unset? unlink() is a function for file system handling. It will simply delete the file in context. unset() is a function for variable management. It will make a variable undefined.
How do I open a file to write content to?
Working with files and folders in PHP is fairly easy though it can take a little while to get used to.

You need to create a filehandle, which is a pointer to a file, that you wish to write too.

Use the fopen function to open a file, and pass the name of the file as the first parameter and what you want to do with it second - in this case 'w' for write.

Then simple use fwrite to write to your file, and close it with fclose.

Here's a simple example that will create a file in the directory called example.txt and write to it with just a few lines of PHP code.

<?php

$myfile = fopen("example.txt","w"); fwrite($myfile,"That was easy!"); fclose($myfile); ?>
For printing out strings, there are echo, print and printf. Explain the differences. echo is the most primitive of them, and just outputs the contents following the construct to the screen. print is also a construct (so parentheses are optional when calling it), but it returns TRUE on successful output and FALSE if it was unable to print out the string. However, you can pass multiple parameters to echo, like:
<?php echo ‘Welcome ‘, ‘to’, ‘ ‘, ‘fyicenter!’; ?> and it will output the string “Welcome to fyicenter!” print does not take multiple parameters. It is also generally argued that echo is faster, but usually the speed advantage is negligible, and might not be there for future versions of PHP. printf is a function, not a construct, and allows such advantages as formatted output, but it’s the slowest way to print out data out of echo, print and printf.

12) What is the difference between mysql_fetch_object and mysql_fetch_array? String Function :

1)what does php strstr do? What is the equivalent javascript method?
Find the first occurrence of a string

what is output of: $e = false || true; $f = false or true; stristr is case-insensitive means able not able to diffrenciate between a and A
2)I want to combine two variables together: $var1 = 'Welcome to '; $var2 = 'TechInterviews.com'; What will work faster? Code sample 1: $var 3 = $var1.$var2; Faster Or code sample 2: $var3 = "$var1$var2";

3) What’s the difference between htmlentities() and htmlspecialchars()? - htmlspecialchars only takes care of <, >, single quote ‘, double quote " and ampersand. htmlentities translates all occurrences of character sequences that have different meaning in HTML.
Would you initialize your strings with single quotes or double quotes?
Since the data inside the single-quoted string is not parsed for variable substitution, it’s always a better idea speed-wise to initialize a string with single quotes, unless you specifically need variable substitution.

How can I check if a value is already in an array?
<?php
$values = array("banana","apple","pear","banana");
$newvalue = "pear"; if (in_array($newvalue,$values)) { echo "$newvalue is already in the array!"; }
?>
How can I create an array of the letters of the alphabet?
$letters = range(a,z);

How can I easily view all members of an array?
I want to invert my array, can I do this?
<?php
$values = array("Fred","Bob","George"); print_r($values); $values = array_flip($values); print_r($values); ?>
Array
(
[0] => Fred
[1] => Bob
[2] => George
)
Array
(
[Fred] => 0
[Bob] => 1
[George] => 2
)
How do I remove the first element from an array?
<?php
$values = array(1,2,3,4,5,6,7,8,9,10);
$first = array_shift($values); echo "First value was: $first"; print_r($values); ?> First value was: 1
Array([0] => 2[1] => 3[2] => 4[3] => 5[4] => 6[5] => 7[6] => 8[7] => 9[8] => 10)
How we use array_search() in PHP?
When we use array_search() function if it found the particular value than it will return index corresponding to array value.
Example:
<?php
$Emp_name_array = array(0 => 'vivek', 1 => 'umang', 2 => 'shrish', 3 => 'jalees');
$key = array_search('umang', $Emp_name_array);
// return $key = 1;
$key = array_search('vivek', $Emp_name_array); // return $key = 0;
?>

Ques: 5 How you differentiate among sort(),assort() and Ksort()?
1) sort()
This function sorts an array. Elements will be arranged from lowest to highest when this function has completed.
2) asort()
This function sorts an array such that array indices maintain their correlation with the array elements they are associated with. This is used mainly when sorting associative arrays where the actual element order is significant. 3) ksort()
Sorts an array by key, maintaining key to data correlations. This is useful mainly for associative arrays.

SESSION :
1)what is session?

2)default session time?
1440 seconds(24 minutes)

3)Can we change it? And how can we change it? through ini_set() method.
<?php
$intTime=152; ini_set("session.gc_maxlifetime",$intTime);?> 4) default session save path? session_save_path() returns the path of the current directory used to save session data.

COockies :

what is cookie?

how can we create cookie? bool setcookie ( string $name [, string $value [, int $expire = 0 [, string $path [, string $domain [, bool $secure = false [, bool $httponly = false ]]]]]] )

what is persistent cookie ?
A persistent cookie is a cookie which is stored in a cookie file permanently on the browser's computer. By default, cookies are created as temporary cookies which stored only in the browser's memory. When the browser is closed, temporary cookies will be erased. You should decide when to use temporary cookies and when to use persistent cookies based on their differences:

Temporary cookies can not be used for tracking long-term information.

Persistent cookies can be used for tracking long-term information.

Temporary cookies are safer because no programs other than the browser can access them.

Persistent cookies are less secure because users can open cookie files see the cookie values.

Error types in php ?
1. Notices: These are trivial, non-critical errors that PHP encounters while executing a script - for example, accessing a variable that has not yet been defined. By default, such errors are not displayed to the user at all - although you can change this default behaviour.

2. Warnings: These are more serious errors - for example, attempting to include() a file which does not exist. By default, these errors are displayed to the user, but they do not result in script termination.

3. Fatal errors: These are critical errors - for example, instantiating an object of a non-existent class, or calling a non-existent function. These errors cause the immediate termination of the script, and PHP?s default behavior is to display them to the user when they take place.

difference between explode and split ?
Split function splits string into array by regular expression.
Ex. split(" :", " Jaipur : Delhi : Noida ");
- Explode splits a string into array by string.
Ex. explode(" and", "Jaipur and Delhi and Noida")

6) What is htaccess? Why do we use this and Where?
.htaccess files are configuration files of Apache Server which provide a way to make configuration changes on a per-directory basis. A file, containing one or more configuration directives, is placed in a particular document directory, and the directives apply to that directory, and all subdirectories thereof.
Ques: 20 How we can increase the execution time of a PHP script?
Ans:
I have given you some function using them you can increase the execution time of a PHP script.Default time for execution of a PHP script is 30 seconds.
These are,
1.set_time_limit()//change execution time temporarily.
2.ini_set()//change execution time temporarily.
3. By modifying `max_execution_time' value in PHP configuration(php.ini) file.//change execution time permanent.

Why Yii is so Fast
Yii is so much faster because it is using the lazy loading technique extensively. For example, it does not include a class file until the class is used for the first time; and it does not create an object until the object is accessed for the first time. Other frameworks suffer from the performance hit because they would enable a functionality (e.g. DB connection, user session) no matter it is used or not during a request.
What are the different features of this framework?

OOPS Question: [Framework]
What are the differences between procedure-oriented languages and object-oriented languages?
Answers : 23 There are lot of difference between procedure language and object oriented like below
1>Procedure language easy for new developer but complex to understand whole software as compare to object oriented model
2>In Procedure language it is difficult to use design pattern mvc , Singleton pattern etc but in OOP you we able to develop design pattern
3>IN OOP language we able to ree use code like Inheritance ,polymorphism etc but this type of thing not available in procedure language on that our Fonda use COPY and PASTE .

1) What is Constructor / Destructor : constructor method is called for every object creation.We can call parent's constructor method using parent::__construct() from the child constructor.This method is called as soon as the references of the object are removed or if we destroy the object . This feature has been included in PHP 5. Like constructor method we can call the destructor method of parent class by parent::__destruct().
2) What are access modifiers?
Access modifiers decide whether a method or a data variable can be accessed by another method in another class or subclass. four types of access modifiers:
Public: - Can be accessed by any other class anywhere.
Protected: - Can be accessed by classes inside the package or by subclasses ( that means classes who inherit from this class).
Private - Can be accessed only within the class. Even methods in subclasses in the same package do not have access.
Default - (Its private access by default) accessible to classes in the same package but not by classes in other packages, even if these are subclasses. 3) what is final keyword?
Final keyword prevents child classes from overriding a method of super or parent class. If we declare a class as final then it could not have any child class that means no class can inherit the property of this class. 4) what is autoload Magic Method ?
The autoload() magic method of PHP5 get automatically called whenever you try to load an object of class which resides in separate file and you have not included those files using include,require and include_once. It is recommended to use the filename as that of the class name.
What is the use of friend function?
Sometimes a function is best shared among a number of different classes. Such functions can be declared either as member functions of one class or as global functions. In either case they can be set to be friends of other classes, by using a friend specifier in the class that is admitting them. Such functions can use all attributes of the class which names them as a friend, as if they were themselves members of that class. A friend declaration is essentially a prototype for a member function, but instead of requiring an implementation with the name of that class attached by the double colon syntax, a global function or member function of another class provides the match.
5) What is inheritance?
6) What are the types of inheritance?
7) Which types are supported by PHP?
8) what is alternative for multiple inheritance OR What is interface ?
PHP does not support multiple inheritance directly, to implement this we need Interface.
In PHP, signature of the method are declared in the Interface body, and the body part of the method is implemented in derived class. Variables are declared as constant and it can not be changed in the child classes.
We use implement keyword to extend this kind of class, at the same time we can implement more than one interface and one interface can be implemented by another interface.
All methods declared in an interface must be public and the variables should be constant.
This is mandatory that we must declare the body part of the method in the derived class otherwise an error message will be generated.
12) Explain the usage of encapsulation?
Encapsulation specifies the different classes which can use the members of an object. The main goal of encapsulation is to provide an interface to clients which decrease the dependency on those features and parts which are likely to change in future. This facilitates easy changes to the code and features.
13) Explain about abstraction?
Abstraction can also be achieved through composition. It solves a complex problem by defining only those classes which are relevant to the problem and not involving the whole complex code into play.
13) Explain about polymorphism?
Polymorphism helps a sub class to behave like a parent class. When an object belonging to different data types respond to methods which have a same name, the only condition being that those methods should perform different function.
14) Explain about overriding polymorphism?
Overriding polymorphism is known to occur when a data type can perform different functions. For example an addition operator can perform different functions such as addition, float addition etc. Overriding polymorphism is generally used in complex projects where the use of a parameter is more.
16) Explain about parametric polymorphism?
Parametric polymorphism is supported by many object oriented languages and they are very important for object oriented techniques. In parametric polymorphism code is written without any specification for the type of data present. Hence it can be used any number of times.
What’s the special meaning of __sleep and __wakeup?
__sleep returns the array of all the variables than need to be saved, while __wakeup retrieves them.
--------------- MYSQL ----------------------- what is the difference between sql and mysql
SQL means "structured query language" which is the syntax of commands you send to database. MYSQL is the database program which accepts the those commands and gives out the data.

1) - Table types or storage engines in mysql ? - deafult table type in mysql ?
Following tables (Storage Engine) we can create
1. MyISAM(The default storage engine IN MYSQL Each MyISAM table is stored on disk in three files. The files have names that begin with the table name and have an extension to indicate the file type. An .frm file stores the table format. The data file has an .MYD (MYData) extension. The index file has an .MYI (MYIndex) extension. )
2. InnoDB(InnoDB is a transaction-safe (ACID compliant) storage engine for MySQL that has commit, rollback, and crash-recovery capabilities to protect user data.)
3. Merge
4. Heap (MEMORY)(The MEMORY storage engine creates tables with contents that are stored in memory. Formerly, these were known as HEAP tables. MEMORY is the preferred term, although HEAP remains supported for backward compatibility. )
5. BDB (BerkeleyDB)(Sleepycat Software has provided MySQL with the Berkeley DB transactional storage engine. This storage engine typically is called BDB for short. BDB tables may have a greater chance of surviving crashes and are also capable of COMMIT and ROLLBACK operations on transactions)
6. EXAMPLE
7. FEDERATED (It is a storage engine that accesses data in tables of remote databases rather than in local tables.)
8. ARCHIVE (The ARCHIVE storage engine is used for storing large amounts of data without indexes in a very small footprint. )
9. CSV (The CSV storage engine stores data in text files using comma-separated values format.)
10. BLACKHOLE (The BLACKHOLE storage engine acts as a "black hole" that accepts data but throws it away and does not store it. Retrievals always return an empty result)

12. What does myisamchk do?
Ans: It compressed the MyISAM tables, which reduces their disk usage.

13. Explain advantages of InnoDB over MyISAM?
Ans: Row-level locking, transactions, foreign key constraints and crash recovery.

What are the differences between DROP a table and TRUNCATE a table?
DROP TABLE table_name – This will delete the table and its data.
TRUNCATE TABLE table_name – This will delete the data of the table, but not the table definition.

How do I access the current time with mysql?

<?php
$update = mysql_query("UPDATE my_users SET lastlogin = NOW() WHERE username = 'elvis'");
?>

15. What are HEAP tables in MySQL?
Ans: HEAP tables are in-memory. They are usually used for high-speed temporary storage. No TEXT or BLOB fields are allowed within HEAP tables. You can only use the comparison operators = and <=>. HEAP tables do not support AUTO_INCREMENT. Indexes must be NOT NULL.

16. How do you control the max size of a HEAP table?
Ans: MySQL config variable max_heap_table_size. 20. What happens when the column is set to AUTO INCREMENT and you reach the maximum value for that table?
Ans: It stops incrementing. It does not overflow to 0 to prevent data losses, but further inserts are going to produce an error, since the key has been used already.

4. What’s the default port for MySQL Server?
Ans: 3306

2) difference between mysql_connect() and mysql_pconnect() ?
When we are using mysql_connect() function, every time it is opening and closing the database connection, depending on the request .

But in case of mysql_pconnect() function,
First, when connecting, the function would try to find a (persistent) connection that’s already open with the same host, username and password. If one is found, an identifier for it will be returned instead of opening a new connection.
Second, the connection to the SQL server will not be closed when the execution of the script ends. Instead, the connection will remain open for future use (mysql_close() will not close connection established by mysql_pconnect()).

mysql_pconncet() is useful when you have a lot of traffice on your site. At that time for every request it will not open a connection but will take it from the pool. This will increase the efficiency of your site. But for general use mysql_connect() is best.

How do I find the longest value in my mysql table?
$q = mysql_query("SELECT LENGTH(firstname) AS thelength FROM myfriends ORDER BY thelength DESC LIMIT 1");
$longestname = mysql_result($q,0,0);

3) what is aggregate function ? ask any example if know ? ( MIN() , MAx() , AVG() , COUNT etc are aggregate funtions ) 4) simple query - find first 5 employees who has maximum salary - find empoyee who has second max salary 5) Joins and indexing

6) Join or sub-query which one is faster? - In most cases JOINs are faster than sub-queries and it is very rare for a sub-query to be faster.
In JOINs RDBMS can create an execution plan that is better for your query and can predict what data should be loaded to be processed and save time, unlike the sub-query where it will run all the queries and load all their data to do the processing.
The good thing in sub-queries is that they are more readable than JOINs: that's why most new SQL people prefer them; it is the easy way; but when it comes to performance, JOINS are better in most cases even though they are not hard to read too. How can I retrieve values from one database server and store them in other database server using PHP?
For this purpose, you can first read the data from one server into session variables. Then connect to other server and simply insert the data into the database.

JavaScript:
Are Java and JavaScript the Same?
No.java and javascript are two different languages.
Java is a powerful object - oriented programming language like C++,C whereas Javascript is a client-side scripting language with some limitations.
How to embed javascript in a web page? javascript code can be embedded in a web page between <script langugage="javascript"></script> tags
How do you submit a form using Javascript?
Use document.forms[0].submit();
(0 refers to the index of the form – if you have more than one form in a page, then the first one has the index 0, second has index 1 and so on).
1) What are JavaScript types? - Number, String, Boolean, Function, Object, Null, Undefined.

2) What does isNaN function do? - Return true if the argument is not a number.

3) What is negative infinity? - It’s a number in JavaScript, derived by dividing negative number by zero.

4) What boolean operators does JavaScript support? - &&, || and !
How to get the contents of an input box using Javascript?
Use the "value" property. var myValue = window.document.getElementById("MyTextBox").value;
What is the difference between an alert box and a confirmation box?
An alert box displays only one button which is the OK button whereas the Confirm box displays two buttons namely OK and cancel.
What is a prompt box?
A prompt box allows the user to enter input by providing a text box.
How to comment javascript code?
Use // for line comments and
/*
*/ for block comments

5) What does "1"+2+4 evaluate to? - Since 1 is a string, everything is a string, so the result is 124.

6) How about 2+5+"8"? - Since 2 and 5 are integers, this is number arithmetic, since 8 is a string, it’s concatenation, so 78 is the result.

7) What looping structures are there in JavaScript? - for, while, do-while loops, but no foreach.

8) How do you create a new object in JavaScript? - var obj = new Object(); or var obj = {};

9) How do you assign object properties? - obj["age"] = 17 or obj.age = 17.

10) What’s a way to append a value to an array? - arr[arr.length] = value;
What is === operator ?
==== is strict equality operator ,it returns true only when the two operands are having the same value without any type conversion.
How to disable an HTML object ? document.getElementById("myObject").disabled = true;
How to create an input box? prompt("What is your temperature?");
CHECK IF A VARIABLE IS AN INTEGER IN JAVASCRIPT

Codeingniter Questions:

1. What is the URL structure of codeigniter [CodeIgniter uses a segment-based approach] example.com/class/function/ID The first segment represents the controller class that should be invoked.
The second segment represents the class function, or method, that should be called.
The third, and any additional segments, represent the ID and any variables that will be passed to the controller.

2. How to load default libraries and helpers in php 3. Is CodeIgniter Does Require a Template Engine? 4. How can we Removing the index.php file? 5. How can we retrieve an item from your config file? 6. It is possible to create our own library in codeigniter.

CSS: 7. What is CSS?
1. CSS stands for Cascading Style Sheets and is a simple styling language which allows attaching style to HTML elements. Every element type as well as every occurrence of a specific element within that type can be declared an unique style, e.g. margins, positioning, color or size.
2. CSS is a web standard that describes style for XML/HTML documents. 8. ID's are unique: 9. Each element can have only one ID 10. Each page can have only one element with that ID 11. 12. Classes are NOT unique: 13. You can use the same class on multiple elements. 14. You can use multiple classes on the same element. 15. 16. Is CSS case sensitive?
Cascading Style Sheets (CSS) is not case sensitive. However, font families, URLs to images, and other direct references with the style sheet may be.
The trick is that if you write a document using an XML declaration and an XHTML doctype, then the CSS class names will be case sensitive for some browsers.
It is a good idea to avoid naming classes where the only difference is the case, for example: div.myclass { ...} div.myClass { ... }
If the DOCTYPE or XML declaration is ever removed from your pages, even by mistake, the last instance of the style will be used, regardless of case. 17. What is ID selector?
ID selector is an individually identified (named) selector to which a specific style is declared. Using the ID attribute the declared style can then be associated with one and only one HTML element per document as to differentiate it from all other elements. ID selectors are created by a character # followed by the selector's name. The name can contain characters a-z, A-Z, digits 0-9, period, hyphen, escaped characters, Unicode characters 161-255, as well as any Unicode character as a numeric code, however, they cannot start with a dash or a digit.
#abc123 {color: red; background: black}
<P ID=abc123>This and only this element can be identified as abc123 </P> 18. What is inline style? How to link?
Inline style is the style attached to one specific element. The style is specified directly in the start tag as a value of the STYLE attribute and will apply exclusively to this specific element occurrence.
<P STYLE="text-indent: 10pt">Indented paragraph</P> 19. Inline Styles Advantages
* Useful for small quantities of style definitions
* Can override other style specification methods at the local level so only exceptions need to be listed in conjunction with other style methods
Disadvantages
* Does not distance style information from content (a main goal of SGML/HTML)
* Can not control styles for multiple documents at once
* Author can not create or control classes of elements to control multiple element types within the document
* Selector grouping methods can not be used to create complex element addressing scenarios 20. 1. Explain float property. 21. 2. what is inline styling? what other different types exist? when is inline styling necessary (newsletters) 22. 3. what is z-index? 23. 4. Difference in a css class and css id.

------------- Ajax --------------------------
1) What is ajax ?

2) What is syncronus and asyncronus javascript ?
There are two ways that Ajax can access the server.
These are synchronous (wnere the script stops and waits for the server to send back a reply before continuing) and asynchronous (where the script allows the page to continue to be processed and will handle the reply if and when it arrives).

3) How many types of ready states in ajax? 0: request not initialized 1: server connection established 2: request received 3: processing request 4: request finished and response is ready 4) Using ajax can we upload files?

5) Can we submit form using ajax?

6) Can we use ajax in jQuery ?

7) How can we post data using ajax?

8) What is use of XML? (If he knows xml)

ZEND:
Does Zend Framework support PHP 4?
Where is the model in ZF's MVC implementation?
Is ZF a component library or a framework? (http://rathinasamyy.blogspot.in/2011/09/zend-framework-interview-questions.html)
11.what is routing and how it's work?
18.cacheZend_Cache provides a generic way to cache any data.
Caching in Zend Framework is operated by frontends while cache records are stored through backend adapters (File, Sqlite, Memcache...) through a flexible system of IDs and tags. Using those, it is easy to delete specific types of records afterwards (for example: "delete all cache records marked with a given tag").
The core of the module (Zend_Cache_Core) is generic, flexible and configurable. Yet, for your specific needs there are cache frontends that extend Zend_Cache_Core for convenience: Output, File, Function and Class.
Smarty:
1. What is Smarty?
Ans: Smarty is a template engine for PHP... but be aware this isn't just another
PHP template engine. It's much more than that.
2. What's the difference between Smarty and other template engines?
Ans: Most other template engines for PHP provide basic variable substitution and dynamic block functionality. Smarty takes a step further to be a "smart" template engine, adding features such as configuration files, template functions, variable modifiers (see the docs!) and making all of this functionality as easy as possible to use for both programmers and template designers. Smarty also compiles the templates into PHP scripts, eliminating the need to parse the templates on every invocation, making Smarty extremely scalable and manageable for large application needs.

1. can we use loop in smarty?
- loops in smarty: http://www.smarty.net/docsv2/en/language.function.section.tpl http://www.smarty.net/docsv2/en/language.function.foreach 1. How can we write an javascript code in template?
Ans: Surround your javascript with {literal}{/literal} tags.
----------------------
3. What do you mean "Compiled PHP Scripts"?
Ans: Smarty reads the template files and creates PHP scripts from them. Once these PHP scripts are created, Smarty executes these, never having to parse the template files again. If you change a template file, Smarty will recreate the PHP script for it. All this is done automatically by Smarty.
Template designers never need to mess with the generated PHP scripts or even know of their existance. (NOTE: you can turn off this compile checking step in Smarty for increased performance.)

6.How can I be sure to get the best performance from Smarty?
Ans: Be sure you set $compile_check=false once your templates are initially compiled. This will skip the unneeded step of testing if the template has changed since it was last compiled. If you have complex pages that don't change too often, turn on the caching engine and adjust your application so it doesn't do unnecessary work (like db calls) if a cached page is available. See the documentation for examples.
$this->config->system_url();
This function retrieves the URL to your system folder.

Payment Gateway :
Which payment gateway is used ? how can we configure Paypal,etc.?
Nothing more we have to do only redirect to the payPal url after submit all information needed by paypal like amount,adresss etc.
How to implement [handle] authentication or security issue?
How to handle error scenarios ?
How to handle transaction fail situation? how to implement quickbooks payment gateway? on quickbook's site a downloadable package is given just copy it and include the folder in our project folder how data is sent to quickbooks? generating an xml file of data, the code is given in the folder we just need to make changes in it according to our data how the response is obtained? call above file and function that generates the xml then internally sends the data and returns the response, on their site response meanings are given. how transactions can be viewed? on quickbooks site, with user's login details, all the history is maintained.
When to use quickbook? When we do not want user to leave our site to go to a payment gateway site (and do not want them to know which payment gateway we are using)

ECOMMORCE : what’s your favorite eCommerce platform to work with and why?

. What eCommerce engine do you most frequently suggest to your clients?
.Do you use templates for your projects and why?
. Are you a member of any eCommerce community?

WordPress
-wordpress is used for content management
How to install WordPress?
How to secure WordPress?
-two types of wordpress is single user or multi user (hya baddal search karun bagh thoda)
-uses of wordpress: blogging etc..
-installation is a zip file that can be downloaded online