PHP Strings

1.		Which of the following functions is used to pad a string with a specified character to a certain length in PHP?

str_pad()

str_replace()

substr()

strlen()

2.		Which of the following functions is used to check if a string contains a specific substring in PHP?

strpos()

str_replace()

strstr()

substr()

3.		Which of the following functions is used to count the number of occurrences of a substring in a string in PHP?

strpos()

str_replace()

substr_count()

strlen()

4.		Which of the following functions is used to compare two strings in PHP?

strcmp()

str_replace()

strlen()

substr()

5.		Which of the following functions is used to trim whitespace from the beginning and end of a string in PHP?

strrev()

substr()

strlen()

trim()

6.		Which of the following functions is used to extract a substring from a string in PHP?

strpos()

str_replace()

substr()

strlen()

7.		Which of the following functions is used to find the position of the first occurrence of a substring in a string in PHP?

strpos()

str_replace()

strlen()

substr()

8.		What function is used to convert a string to all uppercase characters in PHP?

strtoupper()

strtolower()

substr()

strrev()

9.		Which of the following functions is used to replace a substring with another string in PHP?

strpos()

str_replace()

substr()

strtolower()

10.		What function is used to determine the length of a string in PHP?

strlen()

strrev()

str_replace()

substr()