PHP Questions and Answers – String – Part 2

This collection of PHP Multiple Choice Questions and Answers (MCQs): Quizzes & Practice Tests with Answer focuses on “String”.
 

1. Which function is used for replacing the entire string with an alternative string?

A Replace()

B Str_replace()

C Strrpos()

D Strstr()

<?php 
    echo str_replace("Alex", "World", "Hello Alex!");  
    //Output: Hello World!
?>

2. Stristr() is same to Strstr() except that ______

A The comparison is case independent

B The comparison start from middle

C The comparison is case sensitive

D None of them

3. Which one of the following function is used to capitalize first letter of each word in a string?

A strtupper()

B strword()

C ucwords()

D ucfirst()

<?php 
    echo ucwords("hello world");
    //Output: Hello World
?>

4. Strstr() function allow us to select a substring by its ______

A Position

B Numerical value

C Content

D None of them

<?php 
    echo strstr("Hello world!","wor");
?>

world!

5. Which one of the following function is used to remove blank space in a String?

A chop()

B rtrim()

C starts()

D Both A and B

6. If you want to check if a string is equal to another string which function you can use?

A strpos()

B str()

C strpid()

D All of them

if (strpos($str, $needle) === 0)
{
    // the $needle is found at position 0 in the $str
}

7. What is the opposite function of explode()?

A str()

B impose()

C strtok()

D implode()

<?php 
    $arr = array('Welcome','to','StackHowTo!');
    echo implode(" ",$arr);
?>

Welcome to StackHowTo!

8. MD5 is not secure to store passwords because It__________

A generates output in hexadecimal values

B generates the same output string as given input string

C generates Boolean results

D None of them

9. A function that receives a filename as argument and returns a MD5 of that file

A md_file()

B md5()

C md5_file()

D digest_file()

10. Which one of the following function is used to receive a string as argument and returns a string that is stripped of all HTML and PHP tags?

A nl2br()

B strip()

C strip_tags()

D All of them

<?php 
    echo strip_tags("Hello <b>world!</b>");
?>

Hello world!

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