PHP Coding Questions and Answers - Functions - 6

This set of PHP Multiple Choice Questions & Answers (MCQs) focuses on “Functions – 6”.

1. What will be the output of the following PHP code?

```
<?php
```
```
function colour()
```
```
{ 
```

    $colors = array("red", "green", "blue", "yellow");

```
    foreach ($colors as $value)
```
```
    {
```
```
 echo "$value ";
```
```
    }
```
```
}
```
```
colour();
```
```
?>
```

  red 
  green 
  blue 
  yellow

  green 
  blue 
  yellow 
  red

  red  
  blue 
  yellow
  green

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  red 
  green  
  yellow  
  blue

View Answer

Answer: a
Explanation: For each function causes the program to loop through each array value once.

2. What will be the output of the following PHP code?

```
<?php
```
```
function addFunction($num1, $num2)
```
```
{
```
```
    $sum = $num1 + $num2;
```
```
    return $sum;
```
```
}
```
```
$return_value = addFunction(10, 20);
```

echo "Returned value from the function : " .$return_value

```
?>
```

a) Returned value from the function : $return_value
b) Error
c) Returned value from the function : 30
d) Returned value from the function :
View Answer

Answer: c
Explanation: Function returns 30.

3. What will be the output of the following PHP code?

```
<?php
```
```
function time($string)
```
```
{
```

    echo strtr("Towe Pa55", "ow5", $string);

```
}
```
```
time("ims");
```
```
?>
```

a) Time Pa55
b) Towe Pa55
c) Towe Pass
d) Time Pass
View Answer

Answer: d
Explanation: The strtr() function translates certain characters in a string.

4. What will be the output of the following PHP code?

```
<?php
```
```
function constant()
```
```
{
```

    define("GREETING", "Welcome to Narnia");

```
    echo greeting;
```
```
}
```
```
?>
```

a) Welcome to Narnia
b) greeting
c) GREETING
d) ERROR
View Answer

Answer: d
Explanation: By default constants are case sensitive. Hence an error will arise.

5. What will be the output of the following PHP code?

```
<?php
```
```
function constant()
```
```
{
```

    define("GREETING", "Welcome to Narnia",true);

```
    echo greeting;
```
```
}
```
```
?>
```

a) Welcome to Narnia
b) greeting
c) GREETING
d) ERROR
View Answer

Answer: a
Explanation: By default constants are case sensitive. But the third parameter in define(), if set to true, makes constants case insensitive.

6. What will be the output of the following PHP code?

```
<?php
```
```
function start($string)
```
```
{
```
```
 if ($string < 45)
```
```
        return 20;
```
```
    else
```
```
        return 40;
```
```
}
```
```
$t = start(90);
```
```
if ($t < 20)
```
```
{
```
```
    echo "Have a good day!";
```
```
}
```
```
else
```
```
{
```
```
    echo "Have a good night!";
```
```
}
```
```
?>
```

a) Have a good day!
b) Have a good night!
c) ERROR
d) None of the mentioned
View Answer

Answer: b
Explanation: Function returns 40. This is greater than 20, hence the output.

7. What will be the output of the following PHP code?

```
<?php
```
```
function case()
```
```
{
```
```
 ECHO "Hello World! ";
```
```
 echo "Hello World! ";
```
```
 EcHo "Hello World! ";
```
```
}
```
```
case();
```
```
?>
```

a) Hello World!
b)

  Hello World!
  Hello World!

  Hello World!
  Hello World!
  Hello World!

d) None of the mentioned
View Answer

Answer: c
Explanation: Functions, keywords etc in php are case insensitive.

8. What will be the output of the following PHP code?

```
<?php
```
```
function email()
```
```
{
```
```
    $email = ’user@yahoo.com’;
```
```
    $new = strstr($email, ‘@');
```
```
    echo $new;
```
```
}
```
```
email();
```
```
?>
```

a) user
b) [email protected]
c) @yahoo.com
d) yahoo.com
View Answer

Answer: c
Explanation: The strstr() function searches for the first occurrence of a string inside another string.

9. What will be the output of the following PHP code?

```
<?php
```
```
function string()
```
```
{
```
```
    echo strstr("Hello world!", 111);
```
```
}
```
```
string();
```
```
?>
```

a) o world!
b) Hello world!
c) 111
d) No Output
View Answer

Answer: a
Explanation: 111 is the ASCII value of o.

10. What will be the output of the following PHP code?

```
<?php
```
```
function CalAll($x,$y)
```
```
{
```
```
    echo ($x + $y);
```
```
 echo " ";
```
```
    echo ($x - $y);
```
```
 echo " ";
```
```
    echo ($x * $y);
```
```
 echo " ";
```
```
    echo ($x / $y); 
```
```
 echo " ";
```
```
    echo ($x % $y);
```
```
}
```
```
$x = 10; 
```
```
$y = 6;
```
```
CalcAll(); 
```
```
?>
```

  4
  60
  1.6666666666667
  4
  16

  16
  4
  60
  1.6666666666667
  4

  4
  16
  4
  60
  1.6666666666667

  1.6666666666667
  4
  16
  4
  60

View Answer

Answer: b
Explanation: Simple usage of all arithmetic operators.

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