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PHP Strings


1. Which of the following functions is used to reverse a string in PHP?

strrev()

substr()

strlen()

strtolower()


2. Which of the following functions is used to convert special characters to HTML entities in PHP?

htmlentities()

htmlspecialchars_decode()

htmlspecialchars()

str_replace()


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

strpos()

str_replace()

strstr()

substr()


4. 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()


5. Which of the following functions is used to convert a string to an array in PHP?

str_split()

explode()

implode()

substr()


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

strrev()

substr()

strlen()

trim()


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

strcmp()

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 count the number of occurrences of a substring in a string in PHP?

strpos()

str_replace()

substr_count()

strlen()


10. Which of the following functions is used to convert HTML entities to their corresponding characters in PHP?

htmlentities()

htmlspecialchars_decode()

htmlspecialchars()

str_replace()