Php Interview Question and Answers

17. What does the backtick operator return?
  The backtick operator returns the output of the external command it calls. This can be stored, parsed, or printed.
 
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18. Which function would you use to open a pipe to a process?
  You open a connection to a process with the function popen().
 
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19. Which superglobal associative array contains all values submitted as part of a GET request?
  The superglobal array $ GET contains all values submitted as part of a GET request.
 
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20. Which superglobal associative array contains all values submitted as part of a POST request?
  The superglobal array $_POST contains all values submitted as part of a POST request.
 
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