php foreach Loop try not to copy a array

Question

Is there any way of not copying the specific array in the foreach loop? Here's the code

<?php

    $letters = array("A","B","B","C");

      foreach ($letters as $char){
        if ($char == "B") {
          continue; 
        }
        echo $char;
      }

?>

I want my output to be only ABC not AC

My advice: go read the manual, read a good book and practice. For the sake of not leaving my comment "empty": `echo implode(array_unique($letters));` — HamZa, Jul 12 '13 at 09:52
http://stackoverflow.com/questions/307650/how-to-remove-duplicate-values-from-an-array-in-php — rags, Jul 12 '13 at 09:55

score 2 · Answer 1 · answered Jul 12 '13 at 09:50

2

You could strip non-unique elements first:

foreach(array_unique($letters) AS $char)

answered Jul 12 '13 at 09:50

Adam Hopkinson

28,281
7
65
99

I see no sense in using loop for it. – Robert Jul 12 '13 at 09:57

GautamD31 · Answer 2 · 2013-07-12T09:53:14.160

0

Try like

<?php

$letters = array("A","B","B","C");
  $letters = array_unique($letters);
  foreach ($letters as $char){        
       echo $char;
  }
?>

edited Jul 12 '13 at 09:53

answered Jul 12 '13 at 09:49

GautamD31

28,552
10
64
85

Also, `array_unique($letters)` should be `$letters = array_unique($letters);` `$letters` *isn't* being passed by reference as with `sort($letters)`. http://php.net/manual/en/function.array-unique.php – PleaseStand Jul 12 '13 at 09:53
Sorry its just an typo...forgotted to put assigning – GautamD31 Jul 12 '13 at 09:53

score 0 · Answer 3 · answered Jul 12 '13 at 09:52

To copy array use

$a = array("A","B","B","C");
$b = array_unique($a); // $b will be a different array with unique values

There is no need to use foreach. In PHP by default variables are not assigned by reference but by the value unless you use & operator.

The other way is to use array_merge()

$a = array("A","B","B","C");
$b = array();
$b = array_merge(array_unique($a), $b);

In both cases the result will be A B C

php foreach Loop try not to copy a array

3 Answers3