'?' in php

Discussion in 'PHP' started by 1jen, Jun 5, 2011.

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  1. #1
    isset($_COOKIE[""])) ? $_COOKIE[""]+2 : 0;

    Can others please translate what this says? I don't know what '?' question mark with this means in PHP. Thanks a lot.
     
    1jen, Jun 5, 2011 IP
  2. 1jen

    1jen Peon

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    #2
    I know this is, isset($_COOKIE[""])) check to see if cookie is set.

    I don't know what the rest of this with it means after searching everywhere. Thank you.
     
    1jen, Jun 5, 2011 IP
  3. kasun0777

    kasun0777 Well-Known Member

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    #3
    check again your code. i think no "?" in this coding. and this is wrong
     
    kasun0777, Jun 5, 2011 IP
  4. 1jen

    1jen Peon

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    #4 
    isset($_COOKIE[""])) ? $_COOKIE[""]+2 : 0;
    PHP:
    All I said was what does this mean? It does something, I just want to know what it means by you that know PHP code. Because I'm trying to understand what it means so I know if I still need it. I'm only asking something easy, what does it mean? Thank you very much for your help.
     
    1jen, Jun 6, 2011 IP
  5. wmtips

    wmtips Well-Known Member

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    #5
    wmtips, Jun 6, 2011 IP
  6. SiJz

    SiJz Peon

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    #6
    Hi,

    When you're not used to it, it can look quite odd..

    using this code as an example:
    
$var = "";
echo (trim($var)=="") ? "empty" : "not empty";
$var = "a";
echo (trim($var)=="") ? "empty" : "not empty";
    Code (markup):
    basically on the first pass, the $var is empty, the echo will output 'empty', on the next one it will output 'not empty'
    thats a really simple view, it can be used for more complex functionality, as per your sample.

    in your sample, there would be a cookie name in the double quotes that you've removed, lets call it VisitorCount for this example.

    Assuming that the cookie has never been set, so perhaps a first visit
    -> then 0 will be used or returned, depending upon the earlier part of the line that not shown.

    Ok, assuming that the cookie is already set, so perhaps a returning visit, say it has a value of 9
    -> then the value used or returned would be cookie-value+2, so 11

    Hope that helps?

    Si
     
    SiJz, Jun 6, 2011 IP