Print highlighted matrix specific values

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2

In my studies here with matrices I’m trying to highlight only the odd values (leave in bold), but I don’t understand how to do this. Below follows what I did, but I am printing both the numbers in bold and the normal ones.

 <?php
 $matriz = array(
     array(50, 35, 44),
     array(25, 11, 32),
     array(53, 95, 78)
 );
 foreach ($matriz as $v1) {
     foreach ($v1 as $v2) {
         echo $v2, ' '; // imprime todos valores com espaço
         if ($v2 & 1) { // se for impar
             echo '<b>', $v2, '</b>';
         }
     }
     echo '<br/>';
 }
 ?>
php multidimensional-array

  • where that came from $v2 & 1 ?

  • 1

    http://stackoverflow.com/questions/600202/understanding-php-ampersand-bitwise-and-operator

  • 1

    Why did they edit my code? It was very well viewed.

  • 1

    phpricardo, I think only the array is visualized better as @Rodrigorigotti did, but really is a matter of taste and opinion. Rodrigo, we should only dream when it’s an amateur posting code spaghetti. If it was my post, I would revert the keys to a new line, because it’s the style I prefer.

  • @brasofilo understood. actually I usually correct the code according to the standards that the PHP-FIG guys are defining, it’s just a stubbornness of mine :)

2 answers

2

To know if a number is for or odd, use the following:

Par:

$numero % 2 == 0

Odd:

$numero % 2 == 1

So it becomes clearer what you mean, in my opinion.

Besides, I wouldn’t use <b> and yes <strong>.

  • That way you can test Miguel too. ;)

  • 1

    Hint of the accepted Strong. D

2


Your problem was a simple logic error when using two echo to print the items, the correct would be the following:

    foreach ($matriz as $v1){
       foreach ($v1 as $v2){
          // eu removi o echo daqui
           if ($v2 & 1) { // se for impar
               echo '<b>', $v2, ' </b>';
           } else {
              echo $v2,' '; // e coloquei ele aqui
           }
       }
       echo '<br/>';
   }

What was wrong was that you first printed out all the items in the array, and then created one if() printing a second time items that were odd, this time in bold. That’s why these items were duplicated.

  • Perfect Kazzkiq, really was doing wrong, still have problems with logic unfortunately. Thank you for the answer.

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