27 + Interview Questions in Php5 Interview Questions in Php5 Tutorial Page 1 InterviewSolution

1.	Which Is Correct About Mysqli And Pdo?
Answer» MYSQLI can only be USED to access MYSQL database while PDO can be used to access any DBMS. Mysqli can only be used to access MySQL database while PDO can be used to access any DBMS.

1.

Which Is Correct About Mysqli And Pdo?

Answer»

MYSQLI can only be USED to access MYSQL database while PDO can be used to access any DBMS.

Mysqli can only be used to access MySQL database while PDO can be used to access any DBMS.

Discussion

2.	What Is The Correct Php Command To Use To Catch Any Error Messages Within The Code?
Answer» set_error_handler('error_handler'); set_error_handler('error_handler');

2.

What Is The Correct Php Command To Use To Catch Any Error Messages Within The Code?

Answer»

set_error_handler('error_handler');

Discussion

3.	Can Php Use Gettext?
Answer» YES. We can USE GETTEXT in PHP. Yes. We can use gettext in PHP.

3.

Can Php Use Gettext?

Answer»

YES. We can USE GETTEXT in PHP.

Yes. We can use gettext in PHP.

Discussion

4.	What Is The Correct Syntax Of Mail() Function In Php?
Answer» MAIL ($to, $SUBJECT, $MESSAGE,$HEADERS) mail ($to, $subject, $message,$headers)

4.

What Is The Correct Syntax Of Mail() Function In Php?

Answer»

MAIL ($to, $SUBJECT, $MESSAGE,$HEADERS)

mail ($to, $subject, $message,$headers)

Discussion

5.	Which Will Check If A Function Exists?
Answer» function_exists() function_exists()

5.

Which Will Check If A Function Exists?

Answer»

function_exists()

Discussion

6.	What Is The Best Way To Change The Key Without Changing The Value Of A Php Array Element?
Answer» $ARR[$newkey] = $arr[$oldkey]; UNSET($arr[$oldkey]); $arr[$newkey] = $arr[$oldkey]; unset($arr[$oldkey]);

6.

What Is The Best Way To Change The Key Without Changing The Value Of A Php Array Element?

Answer»

$ARR[$newkey] = $arr[$oldkey]; UNSET($arr[$oldkey]);

$arr[$newkey] = $arr[$oldkey]; unset($arr[$oldkey]);

Discussion

7.	Which Is Used To Maintain The Value Of A Variable Over Different Pages?
Answer» session_register() is USED to MAINTAIN the VALUE of a VARIABLE over different pages. session_register() is used to maintain the value of a variable over different pages.

7.

Which Is Used To Maintain The Value Of A Variable Over Different Pages?

Answer»

session_register() is USED to MAINTAIN the VALUE of a VARIABLE over different pages.

session_register() is used to maintain the value of a variable over different pages.

Discussion

8.	Which Is Not A Php Magic Constant?
Answer» Time Time

8.

Which Is Not A Php Magic Constant?

Answer»

Time

Discussion

9.	Which Methods Should Be Used For Sending An Email Using The Variables $to, $subject, And $body?
Answer» MAIL($to,$SUBJECT,$BODY) mail($to,$subject,$body)

9.

Which Methods Should Be Used For Sending An Email Using The Variables $to, $subject, And $body?

Answer»

MAIL($to,$SUBJECT,$BODY)

mail($to,$subject,$body)

Discussion

10.	Which Function Will Suitably Replace 'x' If The Size Of A File Needs To Be Checked? $size=x(filename);
Answer» filesize filesize

10.

Which Function Will Suitably Replace 'x' If The Size Of A File Needs To Be Checked? $size=x(filename);

Answer»

filesize

Discussion

11.	What Is The Correct Line To Use Within The Php.ini File, To Specify That 128mb Would Be The Maximum Amount Of Memory That A Script May Use?
Answer» memory_limit = 128M memory_limit = 128M

11.

What Is The Correct Line To Use Within The Php.ini File, To Specify That 128mb Would Be The Maximum Amount Of Memory That A Script May Use?

Answer»

memory_limit = 128M

Discussion

12.	What Is The Best Practice For Running Mysql Queries In Php? Consider The Risk Of Sql Injection.
Answer» USE PDO prepared statements and parameterized QUERIES: for example: $input= $_POST["user-input"] $stmt = $pdo->prepare('INSERT INTO table (column) VALUES (":input"); $stmt->execute(ARRAY(':input' => $input)); Use PDO prepared statements and parameterized queries: for example: $input= $_POST["user-input"] $stmt = $pdo->prepare('INSERT INTO table (column) VALUES (":input"); $stmt->execute(array(':input' => $input));

12.

What Is The Best Practice For Running Mysql Queries In Php? Consider The Risk Of Sql Injection.

Answer»

USE PDO prepared statements and parameterized QUERIES: for example: $input= $_POST["user-input"] $stmt = $pdo->prepare('INSERT INTO table (column) VALUES (":input"); $stmt->execute(ARRAY(':input' => $input));

Use PDO prepared statements and parameterized queries: for example: $input= $_POST["user-input"] $stmt = $pdo->prepare('INSERT INTO table (column) VALUES (":input"); $stmt->execute(array(':input' => $input));

Discussion

13.	Does Php 5 Support Exceptions?
Answer» YES,PHP 5 SUPPORTS EXCEPTIONS. Yes,PHP 5 supports Exceptions.

13.

Does Php 5 Support Exceptions?

Answer»

YES,PHP 5 SUPPORTS EXCEPTIONS.

Yes,PHP 5 supports Exceptions.

Discussion

14.	Which Variable Declarations Within A Class Is Invalid In Php?
Answer» INTERNAL $TERM = 3; internal $term = 3;

14.

Which Variable Declarations Within A Class Is Invalid In Php?

Answer»

INTERNAL $TERM = 3;

internal $term = 3;

Discussion

15.	Which Will Start A Session?
Answer» session_start(); session_start();

15.

Which Will Start A Session?

Answer»

session_start();

Discussion

16.	Which Cryptographic Functions In Php Returns The Longest Hash Value?
Answer» SHA1() sha1()

16.

Which Cryptographic Functions In Php Returns The Longest Hash Value?

Answer»

SHA1()

sha1()

Discussion

17.	Which Is The Correct Way To Check If A Session Has Already Been Started ?
Answer» if (session_id()) ECHO 'session STARTED'; if (session_id()) echo 'session started';

17.

Which Is The Correct Way To Check If A Session Has Already Been Started ?

Answer»

if (session_id()) ECHO 'session STARTED';

if (session_id()) echo 'session started';

Discussion

18.	Which Is Incorrect With Respect To Separating Php Code And Html?
Answer» As PHP is a SCRIPTING LANGUAGE, HTML and PHP cannot be SEPARATED. As PHP is a scripting language, HTML and PHP cannot be separated.

18.

Which Is Incorrect With Respect To Separating Php Code And Html?

Answer»

As PHP is a SCRIPTING LANGUAGE, HTML and PHP cannot be SEPARATED.

As PHP is a scripting language, HTML and PHP cannot be separated.

Discussion

19.	Which Is True About The Singleton Design Pattern?
Answer» A singleton PATTERN MEANS that a CLASS can have only one instance OBJECT. A singleton pattern means that a class can have only one instance object.

19.

Which Is True About The Singleton Design Pattern?

Answer»

A singleton PATTERN MEANS that a CLASS can have only one instance OBJECT.

A singleton pattern means that a class can have only one instance object.

Discussion

20.	Which Is Useful For Method Overloading?
Answer» __call,__get,__set __call,__get,__set

20.

Which Is Useful For Method Overloading?

Answer»

__call,__get,__set

Discussion

21.	What Function Should You Use To Join Array Elements With A Glue String?
Answer» implode implode

21.

What Function Should You Use To Join Array Elements With A Glue String?

Answer»

implode

Discussion

22.	Which Function Can Be Used To Delete A File?
Answer» unlink unlink

22.

Which Function Can Be Used To Delete A File?

Answer»

unlink

Discussion

23.	What Is The String Concatenation Operator In Php?
Answer» ( . ) ( . )

23.

What Is The String Concatenation Operator In Php?

Answer»

( . )

Discussion

24.	What Would Occur If A Fatal Error Was Thrown In Your Php Program?
Answer» The PHP PROGRAM will stop executing at the point where the error OCCURRED. The PHP program will stop executing at the point where the error occurred.

24.

What Would Occur If A Fatal Error Was Thrown In Your Php Program?

Answer»

The PHP PROGRAM will stop executing at the point where the error OCCURRED.

The PHP program will stop executing at the point where the error occurred.

Discussion

25.	Which Is Not A File-related Function In Php?
Answer» fappend fappend

25.

Which Is Not A File-related Function In Php?

Answer»

fappend

Discussion

26.	What Enctype Is Required For File Uploads To Work?
Answer» multipart/form-data multipart/form-data

26.

What Enctype Is Required For File Uploads To Work?

Answer»

multipart/form-data

Discussion

27.	Which Will Print Out The Php Call Stack?
Answer» var_dump($E-&GT;getTraceAsString()); var_dump($e->getTraceAsString());

27.

Which Will Print Out The Php Call Stack?

Answer»

var_dump($E-&GT;getTraceAsString());

var_dump($e->getTraceAsString());

Discussion

Explore topic-wise InterviewSolutions in .

Which Is Correct About Mysqli And Pdo?

What Is The Correct Php Command To Use To Catch Any Error Messages Within The Code?

Can Php Use Gettext?

What Is The Correct Syntax Of Mail() Function In Php?

Which Will Check If A Function Exists?

What Is The Best Way To Change The Key Without Changing The Value Of A Php Array Element?

Which Is Used To Maintain The Value Of A Variable Over Different Pages?

Which Is Not A Php Magic Constant?

Which Methods Should Be Used For Sending An Email Using The Variables $to, $subject, And $body?

Which Function Will Suitably Replace 'x' If The Size Of A File Needs To Be Checked? $size=x(filename);

What Is The Correct Line To Use Within The Php.ini File, To Specify That 128mb Would Be The Maximum Amount Of Memory That A Script May Use?

What Is The Best Practice For Running Mysql Queries In Php? Consider The Risk Of Sql Injection.

Does Php 5 Support Exceptions?

Which Variable Declarations Within A Class Is Invalid In Php?

Which Will Start A Session?

Which Cryptographic Functions In Php Returns The Longest Hash Value?

Which Is The Correct Way To Check If A Session Has Already Been Started ?

Which Is Incorrect With Respect To Separating Php Code And Html?

Which Is True About The Singleton Design Pattern?

Which Is Useful For Method Overloading?

What Function Should You Use To Join Array Elements With A Glue String?

Which Function Can Be Used To Delete A File?

What Is The String Concatenation Operator In Php?

What Would Occur If A Fatal Error Was Thrown In Your Php Program?

Which Is Not A File-related Function In Php?

What Enctype Is Required For File Uploads To Work?

Which Will Print Out The Php Call Stack?