Mostly asked PHP Interview Questions

What does PHP stand for?

• Hypertext Preprocessor
• Personal Home Page Preprocessor
• Private Home Page
• Preformatted Hypertext Page
• Preprocessed Hypertext Programmer
• option1
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Which symbol is used to declare a variable in PHP?

• @
• $
• &
• #
• %
• option2
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Which of the following are valid superglobal arrays in PHP? (Select all that apply)

Ans. - option1,option2,option3,option5

Which of the following options can be used for single-line comments in PHP? (Select all that apply)

Ans. - option1,option2

Which function in PHP is used to delete a file from the server?

• delete()
• unset()
• unlink()
• remove()
• erase()
• option3
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Which of the following loop structures are supported in PHP? (Select all that apply)

Ans. - option1,option2,option4,option5

Which built-in PHP function includes and evaluates a file, causing a fatal error if the file is not found?

Ans. - require

Which superglobal variable holds information about headers, paths, and script locations?

• $_GLOBALS
• $_SERVER
• $_REQUEST
• $_ENV
• $_SESSION
• option2
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Which of the following functions are used to check variable types or state in PHP? (Select all that apply)

Ans. - option1,option2,option3,option5

What is the standard file extension for PHP scripts?

Ans. - .php

Which function is used to send raw HTTP headers to redirect a browser to another page in PHP?

• redirect()
• header()
• url_redirect()
• location()
• route()
• option2
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Which of the following are scalar data types in PHP? (Select all that apply)

Ans. - option1,option2,option3,option4

What happens when a variable is evaluated inside double quotes (" ") compared to single quotes (' ') in PHP?

• Variables inside double quotes are parsed/interpolated, whereas inside single quotes they are treated as literal text.
• Variables inside single quotes are parsed/interpolated, whereas double quotes treat them as literal text.
• Both single and double quotes evaluate variables identically.
• Neither single nor double quotes allow variables inside them.
• Double quotes cause a syntax error if variables are included.
• option1
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What operator is used for string concatenation in PHP?

Ans. - .

Which function destroys all data registered to the current session in PHP?

• session_unset()
• session_destroy()
• session_clear()
• session_stop()
• session_delete()
• option2
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