adplus-dvertising
frame-decoration

Question

Which function is used to verify whether a variable contains a value?

a.

header()

b.

footer()

c.

inset()

d.

isset()

Answer: (d).isset()

Engage with the Community - Add Your Comment

Confused About the Answer? Ask for Details Here.

Know the Explanation? Add it Here.

Q. Which function is used to verify whether a variable contains a value?

Similar Questions

Discover Related MCQs

Q. Which of the following are types of PHP authentication implementation methodologies?

i) Hard-coding a login pair directly into the script
ii) File-based authentication
iii) Data-based authentication
iv) PEAR’S HTTP authentication

Q. In which authentication method does changing the username or password can be done only by entering the code and making the manual adjustment.

Q. The authenticationFile.txt, the file which stores username and password should be stored ___ the server document root.

Q. Which function is used to split a string into a series of substrings, with each string boundary is determined by a specific separator?

Q. In which of the following situations does file-based authentication become inconvenient.

i) small list
ii) large number of user
iii) users are being regularly added
iv) static authentication

Q. Which is the most powerful authentication method among the four?

Q. Which directive determines whether PHP scripts on the server can accept file uploads?

Q. Which of the following directive determines the maximum amount of time that a PHP script will spend attempting to parse input before registering a fatal error?

Q. What is the default value of max_input_time directive?

Q. Since which version of PHP was the directive max_file_limit available.

Q. What is the default value of the directive max_file_limit?

Q. Which directive sets a maximum allowable amount of memory in megabytes that a script can allow?

Q. If you want to temporarily store uploaded files in the /tmp/phpuploads/ directory, which one of the following statement will you use?

Q. Which superglobal stores a variety of information pertinent to a file uploaded to the server via a PHP script?

Q. How many items are available in the $_FILES array?

Q. Which function is used to determine whether a file was uploaded?

Q. What is the full form of DNS?

Q. Which one of the following function checks for the existence of DNS records?

Q. Which one of the following function is used to return an array consisting of various DNS resource records pertinent to a specific domain?

Q. Which one of the following function is used to retrieve the MX records for the domain specified by hostname?