PHP Variables, Echo/Print and Syntax Questions and Answers

This is PHP Programming Sections with Various Multiple choice Questions on PHP Echo/Print, Php Variables and Syntax. Generally these questions are very helpful for Web Developer Interviews.

1. Which symbol is used to declare variable in php?

[A] $

[B] %

[C] #

[D] @

2. How to declare a string variable in php?

[A] string str = “abc”;

[B] var string = “abc”;

[C] $str = “abc”;

[D] None of the above

3. Which are invalid variable ?

[A] $name1

[B] $_name

[C] $1name

[D] All of the above

4. $name = ’foo’;

$$name = ’bar’;

Result of echo $foo;

[A] foo

[B] $name

[C] $$name

[D] bar

5. $name = ’123’;
$$name = ’456’;
Result of echo ${’123’};

[A] 456

[B] 123

[C] 456{123}

[D] None of above

6. How to define constant in php ?

[A] $

[B] define

[C] #define

[D] All of the above

7. Select invalid constant.

[A] Define(‘email’,’test@test.com’);

[B] Define(‘1test’,’test@test.com’);

[C] Define(‘a’,’my first alphabet’);

[D] All of the above

8. $a = 10;
$b = $a;
$b = 20;
Result of echo $a;

[A] 10

[B] 20

[C] 30

[D] None of the above

9. $a = 10;
$b = &$a; // by reference
$b = 20;
Result of echo $a;

[A] 10

[B] 20

[C] 30

[D] None of the above

10. Which are the global array in php ?

[A] $_POST

[B] $_GET

[C] $_REQUEST

[D] All of the above

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PHP Variables, Echo/Print and Syntax Questions and Answers

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