PHP Interview Questions - VI

 

1. What will be the out put of the above code?

 <?php

    $s = 2;

    function Test()
    {
        echo "s = $s";
    }
    Test();
?>

Answers :

a)  1

b)  2

c)  3

d)  No value

Explanation :

The variable $s have only local scope. In order to reference 

a global variable from a function the "global" keyword must 

be used inside the function.

2. What will be the out put of the above code?

<?php

      $x=array("aaa","ttt","www","ttt","yyy","tttt","www");

     $y=array_count_values($x);

     echo $y[ttt];
?> 

Answers :




a)  2




b)  3




c)  1




d)  4







Explanation : 

 

print_r(array_count_values($x )) will print the following array go through it then

you can understand what is happening with  array_count_values($x)

Array
(
    [aaa] => 1
    [ttt] => 2
    [www] => 2

    [yyy] => 1

    [tttt] => 1
 

 )

I hope you get the working if you are not clear with this answer mail me

3. php code can be directly embeded to XHTML document?   Answers :   a)  true   b)  false     4. What will be printed?   <?php FUNCTION TEST() { ECHO "HELLO WORLD!\n"; } test(); ?>   Answers :   a)   HELLO WORLD! b)   nothing  c)    its a compiler error, the code won't run  d)    hello world!       Explanation :   User defined functions and language key words are case in sensitive

4. In php which method is used to get the browser properties?   Answers :   a)  $_SERVER['HTTP_USER_AGENT'] b)  $_SERVER['PHP_SELF']  c)   $_SERVER['SERVER_NAME']  d)  $_SERVER['HTTP_VARIENT']   4.  Which of the following function is used to pick one or more random values from an array?   Answers :   a)  array_rand()  b)  array_random()  c)  Random_array()  d)  Rand_array()   Explanation :    array_rand(source_array , number); source_array is the array from which the values are selected, it is compulsory  and number is optional default value taken as 1 we can give the number as we wish <?php $a=array("a"=>"Prem","b"=>"Aag","c"=>"Horse"); print_r(array_rand($a,2)); ?>      the out put will be as follows and may different  Array ( [0] => c [1] => b )