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Basic PHP Quiz 2

Description: Basic PHP Quiz 2
Number of Questions: 10
Created by:
Tags: php

What is the difference between print() and echo()?



      
php
  1. print() can be used as part of an expression, while echo() can't

  2. echo() can be used as part of an expression, while print() can't

  3. echo() can be used in the CLI version of PHP, while print() can't

  4. print() can be used in the CLI version of PHP, while echo() can't

Answer: 1

What is displayed when the following script is executed?

define(myvalue, "10");
$myarray[10] = "Dog";
$myarray[] = "Human";
$myarray['myvalue'] = "Cat";
$myarray["Dog"] = "Cat";
print "The value is: ";
print $myarray[myvalue]."\\n";
php
  1. The value is: Dog

  2. The value is: Cat

  3. The value is: Human

  4. The value is: 10

Answer: 1

Which of the following is not valid PHP code?



      
php
  1. $_10

  2. ${"MyVar"}

  3. &$something

  4. $10_somethings

Answer: 4

Which of the following tags is not a valid way to begin and end a PHP code block?



      
php
  1. <% %>

  2. <?php ?>

  3. <?= ?>

  4. <! !>

Answer: 4

When turned on, __________ will __________ your script with different variables from HTML forms and cookies.



      
php
  1. show_errors, enable

  2. show_errors, show

  3. register_globals, enhance

  4. register_globals, inject

Answer: 4

What is the value of $result in the following PHP code?

function timesTwo($int)
{
  $int = $int * 2;
}

$int = 2;

$result = timesTwo($int);
php
  1. 0

  2. 2

  3. 4

  4. NULL

Answer: 4

Which of the following prints ‘text/xml’?



      
php
  1. print substr($text, strchr($text, ':'));

  2. print substr($text, strchr($text, ':') 1);

  3. print substr($text, strpos($text, ':') 1);

  4. print substr($text, strpos($text, ':') 2);

Answer: 4

What does echo count (“123?) print out?



      
php
  1. 3

  2. false

  3. null

  4. 1

Answer: 4

Which of the following snippets prints a representation of 42 with two decimal places?



      
php
  1. printf("%.2d\n", 42);

  2. printf("%1.2f\n", 42);

  3. printf("%1.2u\n", 42);

  4. none of the above

Answer: 2

Which of the following expressions multiply the value of the integer variable $a by 4?



      
php
  1. $a *= pow (2, 2);

  2. $a >>= 2;

  3. $a <<= 2;

  4. $a = $a $a;

Answer: 1,3
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