MOST IMPORTANT QUESTIONS GENERALLY USED TO BE ASKED IN THE INTERVIEW ON STRING FUNCTIONS IN PHP

Q1. What is string() function?

Ans: string() function is the manipulation of string.

Q2. What is meant by ucfirst() function? Explain with an example.

Ans: ucfirst() function is the upper case of the first word in a string.

CODE =>

<?php

$str="i am going to school";

$ucfirst=ucfirst($str);

echo "$ucfirst";

?>

OUTPUT =>

I am going to school

Q3. What is meant by lcfirst() function? Explain with an example.

Ans: lcfirst() function is the lowercase of the first word in a string.

CODE =>

<?php

$str="Welcome to our school";

$lcfirst=lcfirst($str);

echo "$lcfirst";

?>

OUTPUT =>

welcome to our school

Q4. What is meant by ucwords() function? Explain with an example. 

Ans: ucwords() function is to provide uppercase to all words in a string.

CODE =>

<?php

$str="hello welcome to our cricket academy";

$ucwords=ucwords($str);

echo "$ucwords";

?>

OUTPUT =>

Hello Welcome To Our Cricket Academy

Q5. What is meant by strlen() function? Explain with an example. 

Ans: strlen() function is to count the length of a string.

CODE =>

<?php

$str="Welcome to PWC";

$strlen=strlen($str);

echo "$strlen";

?>

OUTPUT =>

14

Q6. What is meant by str_word_count() function? Explain with an example. 

Ans: str_word_count() function is to count the length of words in a string.

CODE =>

<?php

$str="Hello welcome to ejobindia";

$strwrdcnt=str_word_count($str);

echo "$strwrdcnt";

?>

OUTPUT =>

4

Q7. What is meant by str_replace() function? Explain with an example. 

Ans: str_replace() function is to replace the characters with some other characters in a string.

CODE =>

<?php

$str="This is our library";

$strrplc=str_replace("This", "It", $str);

echo "$strrplc";

?>

OUTPUT =>

It is our library

Q8. When we use i character or i alphabet?

Ans: We use i character or i alphabet when we do any incase sensitive work.

Q9. What is meant by str_split() function? Explain with an example. 

Ans: str_split() function is used to split each alphabet of a string into an array.

CODE =>

<?php

$str="Test Match Between India Vs South Africa Will Be Played In Eden Garden From Today Onwards";

$strsplt=str_split($str);

print_r($strsplt);

?>

OUTPUT =>

Array ( [0] => T [1] => e [2] => s [3] => t [4] => [5] => M [6] => a [7] => t [8] => c [9] => h [10] => [11] => B [12] => e [13] => t [14] => w [15] => e [16] => e [17] => n [18] => [19] => I [20] => n [21] => d [22] => i [23] => a [24] => [25] => V [26] => s [27] => [28] => S [29] => o [30] => u [31] => t [32] => h [33] => [34] => A [35] => f [36] => r [37] => i [38] => c [39] => a [40] => [41] => W [42] => i [43] => l [44] => l [45] => [46] => B [47] => e [48] => [49] => P [50] => l [51] => a [52] => y [53] => e [54] => d [55] => [56] => I [57] => n [58] => [59] => E [60] => d [61] => e [62] => n [63] => [64] => G [65] => a [66] => r [67] => d [68] => e [69] => n [70] => [71] => F [72] => r [73] => o [74] => m [75] => [76] => T [77] => o [78] => d [79] => a [80] => y [81] => [82] => O [83] => n [84] => w [85] => a [86] => r [87] => d [88] => s )

Q10. What is meant by str_repeat() function? Explain with an example.

Ans: str_repeat() function is used to execute the same thing multiple times which we can also called it as multiplication.

CODE =>

<?php

$str="Capgemini";

$strrpt=str_repeat($str, 5);

echo "$strrpt";

?>

OUTPUT =>

CapgeminiCapgeminiCapgeminiCapgeminiCapgemini  

Q11. What is meant by strstr() function? Explain with an example.

Ans: strstr() function is the string of a string which is used to create the substring from a string. 

CODE =>

<?php

$str="Welcome to Lords";

$strstr=strstr($str, "co");

echo "$strstr";

?>

OUTPUT =>

come to Lords

Q12. What is meant by strpos() function? Explain with an example.

Ans: strpos() function is used to check the position of an alphabet in a string.

CODE =>

<?php

$str="Welcome Team India";

$strpos=strpos($str, "a");

echo "$strpos";

?>

OUTPUT =>

10

Q13. What is meant by strrev() function? Explain with an example.

Ans: strrev() function is used to reverse the entire string.

CODE =>

<?php

$str="I am going to office";

$strrev=strrev($str);

echo "$strrev";

?>

OUTPUT =>

eciffo ot gniog ma I

Q14. What is meant by strrpos() function? Explain with an example.

Ans: strrpos() function is used to count the position of a string from the reverse.

CODE =>

<?php

$str="TCS is an MNC Company";

$strrpos=strrpos($str, "M");

echo "$strrpos";

?>

OUTPUT =>

10

Q15. What is meant by md5() function? Explain with an example.

Ans: md5() function is known as message digest algorithm 5. It's function is used to encrypt it's file into 32 bytes.

CODE =>

<?php

$str="Ayan";

$md5=md5($str);

echo "$md5";

?>

OUTPUT =>

6574bba3da4155c410113ab1e67e505d