This question might show you how playful and creative the candidate is because there are many options. $_SERVER["REMOTE_ADDR"]; is the easiest solution, but the candidate can write x line scripts for this question.
Tell me how can we define a variable accessible in functions of a PHP script?
Explain what is the function file_get_contents() usefull for?
Tell me what is the actually used PHP version?
Tell me what is the use of "ksort" in php?
Tell me how stop the execution of a php scrip?
Do you know how to declare an array in php?
Tell me how to Retrieve a Cookie Value?
Tell me what is the use of isset() in php?
Tell me how to get the value of current session id?
Tell me what is needed to be able to use image function?
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