PHP Filters | PHP Questions

Que.	How many types of filtering are present in PHP?
a.	3
b.	2
c.	None
d.	4

Answer: 2

Que.	What will be the output of the following PHP code? <?php> $num = "123"; if (!filter_var($num, FILTER_VALIDATE_INT)) echo("Integer is not valid"); else echo("Integer is valid"); ?>
a.	Integer is valid
b.	Error
c.	Integer is not valid
d.	No output is returned
Answer: Integer is valid

Que.	Which one of the following filter is used to filter several variables with the same or different filters?
a.	filter_input_array
b.	filter_var_array()
c.	filter_var()
d.	filter_input
Answer: filter_var_array()

Que.	Which of the following is/are an external data? 1. Cookies 2. Input data from a form 3. Server Variables 4. Web services data
a.	Only 2
b.	None of the mentioned
c.	2 and 3
d.	All of the mentioned
Answer: All of the mentioned

Que.	Which one of the following does not describe a validating filter?
a.	Are used to validate user input
b.	Returns the expected type on success or FALSE on failure
c.	Are used to allow or disallow specified characters in a string
d.	Strict format rules

Are used to allow or disallow specified characters in a string