CODEWITHSUNDEEP
phparrays
Sovit Maharjan
Sovit Maharjan

Reputation: 175

How to exclude some repeated values from given array and display it in select tag?

I want to remove that 2 Justin Bieber elements from this array and display it in select tag.

This is the code I have:

<?php
$arr = array('Dream Theater', 'Animals as Leaders', 'Chimp Spanner', 'Periphery', 'Linkin Park', 'Metallica', 'Justin Bieber', 'Slipknot', 'Justin Bieber');
echo "<pre>";
print_r($arr);
?>
<select>
  <?php foreach ($arr as $value) {?>
      <option><?php echo $value?></option> //I do not want to echo "Justin Bieber" here
  <?php }?>
</select>
<?php
die;

Upvotes: 1

Views: 144

Answers (4)

Progrock
Progrock

Reputation: 7485

<?php
$bands    = ['Pink Floyd', 'The Animals', 'The Animals', 'TheThe', 'The Who', 'The Who'];
$counts   = array_count_values($bands);
$repeats  = array_filter($counts, function($v) { return $v>1;});
$filtered = array_diff($bands, array_keys($repeats));
?>
<select>
  <?php foreach ($filtered as $value) { ?>
      <option><?php echo $value?></option>
  <?php }?>
</select>

Output:

<select>
        <option>Pink Floyd</option>
        <option>TheThe</option>
  </select>

Upvotes: 1

Chandler Sherman Hollon
Chandler Sherman Hollon

Reputation: 37

Have you tried an if statement? Inside your foreach statement include :

if ($value!='justin bieber') {?>
//html code to be executed
<?php }?>

Upvotes: 3

Andreas
Andreas

Reputation: 23958

I believe you are looking for array_unique which will remove all duplicates from the array.

$arr = array('Dream Theater', 'Animals as Leaders', 'Chimp Spanner', 'Periphery', 'Linkin Park', 'Metallica', 'Justin Bieber', 'Slipknot', 'Justin Bieber');
$arr = array_unique($arr);

Now you only have one Justin Bieber.

To remove both Justin Bieber you can use array_diff.
This will return all values that is not "Justin Bieber" without looping.

$arr = array('Dream Theater', 'Animals as Leaders', 'Chimp Spanner', 'Periphery', 'Linkin Park', 'Metallica', 'Justin Bieber', 'Slipknot', 'Justin Bieber');
$arr = array_diff($arr, ["Justin Bieber"]);

https://3v4l.org/uLtqS

To reindex the keys (if needed) use array_values.

Upvotes: 1

dWinder
dWinder

Reputation: 11642

You can do that with array-search (to find the string index) and unset.

Consider the following:

$arr = array('Dream Theater', 'Animals as Leaders', 'Chimp Spanner', 'Periphery', 'Linkin Park', 'Metallica', 'Justin Bieber', 'Slipknot', 'Justin Bieber');

$v = 'Justin Bieber';
while ($key = array_search($v, $arr))
    unset($arr[$key]);

Notice this will not fix your indexes (as you don't need to use them) but if you want them to be reset you can use $arr = array_values($arr);

Upvotes: 1

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