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Discussion :: Functions in PHP

  1. Which of the following are valid function names? 1. function() 2. €() 3. .function() 4. $function()

    2. A.

     Only 2
    B.

     None of the mentioned
    C.

     All of the mentioned
    D.

     3 and 4

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    Answer : Option A

    Explanation :

    Except a) others are invalid names. According to the specified regular expression ([a-zA-Z_x7f-xff][a-zA-Z0-9_x7f-xff]*), a function name like this one is valid.

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