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Regular Expressions MCQ question and answer with solution | PHP Programming

Learn Regular Expressions MCQ Questions and answers with easy and logical explanations. Regular Expressions MCQ in PHP programming provides all type of technical mcq questions which is important for technical exams, cumpus exams and other entrance examination Page-2 section-1

11
How many functions does PHP offer for searching and modifying strings using Perl-compatible regular expressions.
Discuss
Answer & Solution
Answer: Option B
Solution:
The functions are preg_filter(), preg_grep(), preg_match(), preg_match_all(), preg_quote(), preg_replace(), preg_replace_callback(), and preg_split().
12
What will be the output of the following PHP code? 
<?php
$foods = array("pasta", "steak", "fish", "potatoes");
$food = preg_grep("/^s/", $foods);
print_r($food);
?>
Discuss
Answer & Solution
Answer: Option C
Solution:
This function is used to search an array for foods beginning with s.
13
Say we have two compare two strings which of the following function/functions can you use?
1. strcmp()
2. strcasecmp()
3. strspn()
4. strcspn()
Discuss
Answer & Solution
Answer: Option D
Solution:
All of the functions mentioned above can be used to compare strings in some or the other way.
14
Which one of the following functions will convert a string to all uppercase?
Discuss
Answer & Solution
Answer: Option A
Solution:
Its prototype follows string strtoupper(string str).
15
What will be the output of the following PHP code? 
<?php
$title = "O'malley wins the heavyweight championship!";
echo ucwords($title);
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
The ucwords() function capitalizes the first letter of each word in a string. Its prototype follows: string ucwords(string str).
16
What will be the output of the following PHP code? 
<?php
echo str_pad("Salad", 5)." is good.";
?>
Discuss
Answer & Solution
Answer: Option D
Solution:
The str_pad() function pads a string with a specified number of characters.
17
Which one of the following functions can be used to concatenate array elements to form a single delimited string?
Discuss
Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
18
Which one of the following functions finds the last occurrence of a string, returning its numerical position?
Discuss
Answer & Solution
Answer: Option D
No explanation is given for this question. Let's Discuss on Board
19
What will be the output of the following PHP code? 
<?php
$author = "nachiketh@example.com";
$author = str_replace("a","@",$author);
echo "Contact the author of this article at $author.";
?>
Discuss
Answer & Solution
Answer: Option C
Solution:
The str_replace() function case sensitively replaces all instances of a string with another.
20
What will be the output of the following PHP code? 
<?php
$url = "contact@examveda.com";
echo ltrim(strstr($url, "@"),"@");
?>
Discuss
Answer & Solution
Answer: Option D
Solution:
The strstr() function returns the remainder of a string beginning with the first occurrence of a predefined string.