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PHP Zebra Striping a Table

Table row in a loop:

<!-- Before loop -->
<?php $c = 0; ?>

<!-- Start loop -->
<tr class="<?=($c++%2==1) ? 'odd' : 'even' ?>">
<!-- End loop -->

CSS:

.even { background-color:#FFF; }
.odd { background-color:#666; }

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  1. Andrew Champ

    You can even replace “tr” with “div” and do it w/ classes!

    Reply ↓
  2. David

    The only problem in this example is that it will give a notice for the undefined variable $c.

    What I usually do is first initialise the variable to 0 before the start of the loop. Then you won’t get the notice.

    Reply ↓
    • alka

      this code doesnt work.

    • Dyllon

      sorry, i’m no good using the code tags..

      i took out the ‘var’ before the $c = 0;

  3. Andrew Champ

    When I insert this code, it renders it unuseable. Why would it work w/o but not with?

    Reply ↓
  4. bucabay

    The keyword “var” can only be used inside a class declaration.

    $c = 0;

    I think you confused it with the “var” keyword in JavaScript which initializes a variable.
    You can also use the bitwise & to get odd and even.

    eg:


    <?php echo $c++&1 ? 'odd' : 'even'; ?>

    Your example also has the odd and even switched around. Odd numbers will have $c++%2==1, not even.

    Reply ↓
  5. Jack

    Please can someone help?

    I put the code into the tr tag on this line and the whole page stops giving an error message with this line number. Also when I put the code into the line the remaining tags don’t work

    echo " \n£ $investment\n";

    Thanks in anticipation

    Reply ↓
  6. Artem

    Cant understand, how it works…

    Reply ↓
  7. iTechRoom

    Very handy and useful trick.

    Reply ↓
  8. Erwin

    what about using array?

    $class = array('even' => 'odd', 'odd' => 'even');
    $curr = 'even';


    <tr class="">

    Reply ↓
  9. Erwin

    sorry, forgot the code wrapper


    <tr class="”>

    Reply ↓
  10. Erwin

    hmm still not working using pre or even code wrapper

    anyway what i do is using $class[$curr] inside my loop

    Reply ↓
  11. jennifer

    Can use this after the “While function”…
    $bgcolor = ($bgcolor == “#ececec”) ? “#ffffff” : “#ececec”;
    then…
    print “

    Reply ↓
  12. apad

    bucabay, your code works!

    Reply ↓

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