Functions in PHP MCQ - Quiz

Explanation: Type hinting gives you the ability to force parameters to be objects of certain class or to be arrays. PHP 5 introduced this feature.

Q: Which of the following PHP functions can be used to get the current memory usage?

A. get_usage()
B. get_peak_usage()
C. get_memory_usage()
D. get_memory_peak_usage()

Correct Option: C
Remarks:

Explanation: We can use the memory_get_usage() function, and to get the highest amount of memory used at any point, we can use the memory_get_peak_usage() function.

Q: What will be the output of the following PHP code?

< ?php 
echo "chr(52)";
?>

A. 1
B. 2
C. 3
D. 4

Correct Option: D
Remarks:

Explanation: The chr() function returns a character from the specified ASCII value. Since the ASCII value of 4 is 52, thus 4 was displayed.

Q: What will be the output of the following PHP code?

< ?php 
    $str = "Hello World"
    echo wordwrap($str,5,"
\n");    
?>

A. Hello World
B. Hello
World
C.
Hell

o wo

rld
D. World

Correct Option: B
Remarks:

Explanation: Hello
World

Q: What will be the output of the following PHP code?

< ?php 
    $op2 = "blabla";
    function foo($op1)
    {
        echo $op1;
        echo $op2;
    }
    foo("hello");
?>

A. helloblabla
B. Error
C. hello
D. helloblablablabla

Correct Option: C
Remarks:

Explanation: If u want to put some variables in function that was not passed by it, you must use “global”. Inside the function type global $op2.

Q: What will be the output of the following PHP code?

< ?php 
    function foo($msg)
    {
        echo "$msg";
    }
    $var1 = "foo";
    $var1("will this work");
?>

A. Error
B. $msg
D. will this work

Correct Option: D
Remarks:

Explanation: It is possible to call a function using a variable which stores the function name.

Functions in PHP MCQ - Quiz

Which one of the following PHP functions can be used to build a function that accepts any number of arguments?

Which one of the following PHP functions can be used to find files?

The filesize() function returns the file size in ___.

Which function sets the file filename

Type Hinting was introduced in which version of PHP?

Which of the following PHP functions can be used to get the current memory usage?

What will be the output of the following PHP code?
< ?php echo "chr(52)"; ?>

What will be the output of the following PHP code?
< ?php $str = "Hello World" echo wordwrap($str,5," \n"); ?>

What will be the output of the following PHP code?
< ?php $op2 = "blabla"; function foo($op1) { echo $op1; echo $op2; } foo("hello"); ?>

What will be the output of the following PHP code?
< ?php function foo($msg) { echo "$msg"; } $var1 = "foo"; $var1("will this work"); ?>

Functions in PHP MCQ - Quiz

Which one of the following PHP functions can be used to build a function that accepts any number of arguments?

Which one of the following PHP functions can be used to find files?

The filesize() function returns the file size in ___.

Which function sets the file filename

Type Hinting was introduced in which version of PHP?

Which of the following PHP functions can be used to get the current memory usage?

What will be the output of the following PHP code? < ?php echo "chr(52)"; ?>

What will be the output of the following PHP code? < ?php $str = "Hello World" echo wordwrap($str,5," \n"); ?>

What will be the output of the following PHP code? < ?php $op2 = "blabla"; function foo($op1) { echo $op1; echo $op2; } foo("hello"); ?>

What will be the output of the following PHP code? < ?php function foo($msg) { echo "$msg"; } $var1 = "foo"; $var1("will this work"); ?>

What will be the output of the following PHP code?
< ?php echo "chr(52)"; ?>

What will be the output of the following PHP code?
< ?php $str = "Hello World" echo wordwrap($str,5," \n"); ?>

What will be the output of the following PHP code?
< ?php $op2 = "blabla"; function foo($op1) { echo $op1; echo $op2; } foo("hello"); ?>

What will be the output of the following PHP code?
< ?php function foo($msg) { echo "$msg"; } $var1 = "foo"; $var1("will this work"); ?>