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  • March 22, 2017 at 12:56 pm #764743
    architchandra

    Hello

    I’m a bit new to PHP so could be very wrong here, but I was going through the loop-index.php file so that I could add the_author() to the grid layout and found this line which I just couldn’t understand:

    $size = strpos($blog_style, ‘big’) ? (strpos($current_post[‘post_layout’], ‘sidebar’) !== false) ? ‘entry_with_sidebar’ : ‘entry_without_sidebar’ : ‘square’;

    I researched a little bit about ternary operators for if/else alternatives but could not find any resource for such syntax where there are multiple ‘:’ without a ‘?’ in between and the parentheses are not wrapped according to ternary operator stacking conventions.

    This is just to cure my curiosity as a beginner. Please let me know what this means. Thanks a ton!

    March 23, 2017 at 12:33 pm #765373
    Nikko

    Hey architchandra,

    Thanks for contacting us :) You can see lots of : with ? before because it’s an alternative syntax for control structures for example instead of:

    if( condition ) {
  statement;
} else {
  statement;
}

    You’ll find:

    if( condition ) :
  statement;
else:
  statement;
endif;

    Or instead of:

    while (have_posts()) {
  statement;
}

    You’ll have:

    <pre><code>while (have_posts()) :
  statement;
endwhile;

    There are a lot more but you can research on that. Hope you find this helpful :)

    Best regards,
    Nikko

    March 23, 2017 at 2:00 pm #765442
    architchandra

    Hello Nikko

    Thank you for trying, but you’ve not been able to answer my question properly.

    I understand that
    if(condition) {
    statement 1;
    } else {
    statement 2;
    }

    can be written as
    if(condition):
    statement 1;
    else:
    statement 2;
    endif;

    or as

    $variable = condition ? statement 1 : statement 2;

    I understand these, but if you notice the code statement that I mentioned, it doesn’t seem to fall under any of these categories, although it seems like it should fall in category 3. Notice that a ? statement follows another ? statement directly (might have made sense if the parentheses were put in differently). Also notice that there is : statement right after another : satement. That to me is not making sense.

    Please help me understand this. Thanks.

    March 23, 2017 at 2:21 pm #765469
    Nikko

    Hi,

    Okay, it’s simple it’s a nested ternary operator.
    $size = strpos($blog_style, ‘big’) ? (strpos($current_post[‘post_layout’], ‘sidebar’) !== false) ? ‘entry_with_sidebar’ : ‘entry_without_sidebar’ : ‘square’;

    I make the inner one bold. So it’s like if

    strpos($blog_style, 'big')

    is true (or has value) then it performs another ternary operation

    (strpos($current_post['post_layout'], 'sidebar') !== false) ? 'entry_with_sidebar' : 'entry_without_sidebar'

    I hope my explanation is good :)

    Best regards,
    Nikko

    • This reply was modified 7 years, 8 months ago by Nikko.
    March 23, 2017 at 2:29 pm #765479
    architchandra

    Thanks Nikko. I will try this out and let you know whether it worked or not. :)

    March 23, 2017 at 2:32 pm #765483
    Nikko

    Hi,

    You’re welcome. Just comment back on this thread if you need help :)

    Best regards,
    Nikko

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